The ability selection screen (if you could call it a screen when it existed solely as information pressed into the awareness of something without eyes) presented three options with the dispassionate neutrality of a fast food menu.

  [ABILITY SELECTION: CHOOSE ONE]

  [1. FLAGELLUM] - Develop a whip-like appendage for directed locomotion. Increases movement speed by 200%. Enables current resistance and active pursuit of nutrient sources.

  [2. MEMBRANE HARDENING] - Reinforce cellular membrane with additional protein layers. Increases damage resistance by 150%. Reduces absorption rate by 10%.

  [3. CALCIUM SPIKE] - Develop a rigid protrusion on the cellular surface. Enables piercing attacks against other organisms. Damage output: Moderate. Unlocks offensive combat capability.

  Andy considered his options with the seriousness of a man choosing his starter Pokemon, which, in a very real and deeply stupid way, was exactly what he was doing. Three paths. Speed, defense, or offense. The holy trinity of every character creation screen he had ever stared at for forty-five minutes while his friends waited in the lobby and eventually started playing without him.

  Flagellum was the mobility pick. He could already move, sort of, in the way single-celled organisms moved: drifting on currents and hoping for the best. A flagellum would give him actual direction, the ability to go where he wanted instead of where the water took him.

  Membrane Hardening was the tank build. More defense, more survivability, the equivalent of strapping on plate armor and daring the world to take a swing. It appealed to the part of him that had always played cautiously, that checked his pocket four times, that looked both ways at crosswalks. The careful build. The safe build. The build that said, "I would rather not die again, thank you, once was more than sufficient."

  But the 10% reduction in absorption rate nagged at him. Defense at the cost of eating speed. A tradeoff that mattered when eating was literally his only way to gain XP, and XP was literally everything.

  And then there was the Calcium Spike.

  Develop a rigid protrusion on the cellular surface.

  A spike. A pointy bit. A hard, stiff appendage that he could use to penetrate other organisms. The universe was really leaning into the innuendo at this point, but Andy chose to believe that was his interpretation and not the System's intent.

  He picked the spike.

  Not because it was strategically optimal, although a part of his brain was already running the calculations and concluding that offensive capability in a world with XP gains would almost certainly translate to faster leveling. Not because he was angry, although he was, in the background, in the basement of his psyche where he had locked the door on the memory of a green signal and a red-running truck. He picked it because Andy Snodgrass had spent twenty-four years being careful, being safe, being the membrane-hardening kind of guy who reinforced his defenses and moved slowly and absorbed the world at a 10% reduced rate, and it had gotten him killed in a crosswalk.

  Also, he always picked the pointy option. In every game, every class selection, every branching skill tree from Dark Souls to Skyrim to that one mobile gacha game he was embarrassed to have spent money on. Sword over shield. Dagger over staff. Spike over shell.

  This was not a metaphor. This was a character build and he was committing to DPS.

  [CALCIUM SPIKE: SELECTED]

  [DEVELOPING...]

  The sensation was unlike anything in his human frame of reference, which was saying something given that his frame of reference had recently been recalibrated from "bipedal mammal with a Costco card" to "blob." Calcium gathered at a single point on his surface with a purposefulness that felt almost intentional, as if the atoms had received a memo. The point hardened. Stiffened. Extended outward.

  It was, by any objective measurement, incredibly small. A tiny protrusion jutting from his membrane like a splinter from a floorboard. But it was his, and it was hard, and if the universe wanted to make jokes about a virgin growing his first stiff protrusion, well, Andy was choosing to be the bigger man. Figuratively. Because literally, he was smaller than a grain of sand.

  [CALCIUM SPIKE: ACQUIRED]

  [HORN MORPHOLOGY: INITIATED]

  He barely registered that second notification. Horn morphology. It sounded like a subsystem tag, the kind of metadata a game engine tracked in the background, irrelevant to the player and relevant only to the code. He filed it away in the same mental drawer where he kept terms-of-service agreements and the nutritional information on cereal boxes: technically available, permanently unread.

  He should have read it.

  But for now, he had a spike, and the spike was sharp, and when he drifted into the path of a smaller cell and slid his new protrusion right into its membrane, it gave way with a satisfying lack of resistance and the cell's contents spilled into the surrounding water like a pi?ata made of amino acids. His first real penetration. Not how he'd imagined it, but honestly? Pretty satisfying.

  [ORGANISM DEFEATED: PROKARYOTE (BASIC)]

  [XP GAINED: +3]

  Three XP. From one kill. Absorbing nutrients from the water had given him one XP per cycle. Killing something and absorbing the remains gave him three. The math was immediately, obviously, embarrassingly clear: violence was more efficient than foraging, a lesson that applied to approximately every video game ever made and apparently also to primordial microbiology.

  Andy Snodgrass, who had never thrown a punch in his human life, who had once apologized to a chair after bumping into it, who had cried during the opening sequence of Up and was not ashamed to admit it, discovered that he had a talent for single-celled combat.

  The pond, as it turned out, was full of things to stab.

  * * *

  Over the next span of time (hours? days? the concept of a "day" assumed a sun and a horizon and eyes to observe the transition between them, none of which he possessed), Andy settled into a routine that he privately called The Loop, because naming things made them feel manageable and managing things was what Andy did when the alternative was confronting the yawning existential void of his situation.

  The Loop went like this: drift through the water sensing for nutrient gradients. When a concentration appeared, move toward it. If the concentration was dissolved organic matter, absorb it. If the concentration was another living cell, stab it and then absorb the results. Gain XP. Repeat.

  It was, he reflected, not dissimilar from the gameplay loop of any survival crafting game, except the crafting was nonexistent and the survival was constant and the graphics were terrible because he navigated by chemical gradients rather than light, which meant everything was less "high-definition rendered landscape" and more "vague impressions of stuff nearby, interpreted by smell through his entire body."

  The spike made everything easier. Other cells had to engulf their prey by slowly wrapping around it, the cellular equivalent of trying to eat a burrito by hugging it. Andy just poked things. One quick thrust and they popped open like biological loot drops. Faster, cleaner, and, if he was being honest with himself, satisfying in a way he chose not to examine too closely. He was getting good at thrusting. That's what she... no. No. He was not making that joke. He was a single-celled organism with dignity.

  [XP: 24/50]

  [NEXT MILESTONE: TIER EVOLUTION]

  Fifty XP for his first tier evolution. He was halfway there. The spike was earning its keep, three XP per kill versus one per passive absorption, and the kills were getting easier as he learned to read the chemical signatures of nearby organisms, to distinguish between the ones worth stabbing (fat, slow, nutrient-dense) and the ones worth avoiding (too large, too fast, or surrounded by chemical markers that his rudimentary senses interpreted as "bad idea, move along").

  He was becoming a predator. A microscopic apex predator in a warm pond, armed with a single spike and eleven thousand hours of gaming instincts. The irony was not lost on him: Andy Snodgrass, the guy who let spiders outside instead of killing them, who had chosen veterinary technology because he wanted to help animals, was now surviving by stabbing other organisms with his horn.

  A very, very small horn. But it was growing.

  But the XP was good, and the XP was the thing that mattered, because XP meant milestones and milestones meant evolution and evolution meant new abilities and new abilities meant new forms and new forms meant, eventually, impossibly, maybe, something with hands and a voice and a body that could walk into a room and be recognized as a person.

  He didn't let himself think about that too hard. Forward. Only forward.

  * * *

  The first time Andy used [DIVIDE], he did it by accident.

  His energy reserves had been climbing steadily as he ate, a secondary bar he had noticed filling beneath his XP counter, labeled simply [ENERGY] with no further explanation, and when it hit capacity the System informed him, with its characteristic lack of ceremony, that binary fission was available and would he like to proceed.

  He said yes because the notification was phrased as a yes/no prompt and his instinct, honed by years of clicking through dialogue boxes without reading them, was to select the affirmative option. By the time he processed what "binary fission" actually meant, the process had already begun.

  It was weird.

  His body (such as it was) elongated. The membrane stretched. Everything inside him replicated and migrated to opposite ends of his stretching form. A pinch formed in the middle, deepening like someone cinching a belt around a water balloon. He was getting longer, thinner, the pressure building at his center, the two halves pulling apart in a slow, rhythmic pulsing that was, and he could not stress this enough, deeply weird when you were conscious for it. The spike remained on his end, which he noted with relief, because the spike was the best thing about him and losing it to a copy would have been cosmically on brand but deeply unfair.

  The tale has been illicitly lifted; should you spot it on Amazon, report the violation.

  And then there were two.

  The new cell, his clone, his offspring, his... son? Daughter? It drifted away from him with the passive indifference of a thing that did not possess consciousness. It had his membrane structure, his basic metabolic machinery, and absolutely none of his personality, opinions, memories, or existential dread. A biological photocopy that captured the text but missed the meaning.

  Andy watched it drift.

  He had just reproduced. Andrew Snodgrass, twenty-four-year-old virgin, had finally done the deed. Alone. In a pond. By ripping himself in half.

  He wanted it on the record, on whatever cosmic record the universe was keeping of his increasingly absurd existence, that this did not count. This was cellular Xeroxing. This was the biological equivalent of copying your homework and turning in both versions. He had not "lost" anything. He had gained a clone and lost half his body mass and the entire experience had lasted about forty-five seconds, which, okay, was probably how his actual first time would have gone too, but that was not the point.

  [BINARY FISSION COMPLETE]

  [OFFSPRING: 1 (NON-SENTIENT)]

  [XP GAINED: +2]

  Two XP for reproducing. Less than killing (three), more than eating (one). The System had, through its XP allocation, created an implicit hierarchy of activities ranked by value: violence first, reproduction second, foraging last. Andy chose not to examine what this said about the moral framework of whatever entity had designed this world's operating system.

  The non-sentient clone drifted out of his perceptive range within minutes, absorbed into the teeming soup of microbial life that was his entire world. He did not mourn it. Hard to mourn something that had never been a someone, just a cell doing cell things without the burden of a human consciousness rattling around inside it like a marble in a tin can.

  He wondered, briefly, if that made the clone the lucky one.

  Then he stabbed another cell and the thought dissolved into XP.

  * * *

  The predator arrived without fanfare. No trumpets. No ominous music cues. Just chemical gradients shifting, and a sudden change in the local profile that translated roughly to something big is nearby and it is hungry.

  He registered it before he understood it. Something moving toward him with the same directed purpose he used on his own prey. Something was hunting him. Something bigger.

  The cell that emerged from the murky water was, relative to Andy, enormous. If Andy was a marble, this thing was a basketball. A bloated mass of predatory intent that moved with the slow, inexorable confidence of an organism that had never met anything it couldn't swallow. It was an amoeba, or something like an amoeba, and it hunted by engulfing, by wrapping its body around smaller cells and dissolving them alive. The cellular equivalent of being swallowed by a beanbag chair filled with digestive acid.

  Andy's calcium spike, his pride and joy, his first chosen ability, looked very small suddenly.

  The predator extended a pseudopod toward him, a thick arm of cytoplasm reaching through the water with the leisurely malice of a hand reaching into a bag of chips. There was no urgency in the motion. Why would there be? The predator was ten times his size. He was food. The interaction, from the predator's perspective, was already concluded; the only remaining step was the eating part.

  Andy did something he had never done as a cell. He panicked.

  Panic, when your entire body is a single cell, is deeply unpleasant. No racing heart. No sweating palms. Just every chemical alarm in his body firing at once, his entire being clenching like a fist, and his spike orienting toward the approaching pseudopod like a porcupine raising its quills. His one hard part, pointed straight at the thing trying to eat him. It wasn't much, but it was all he had.

  He pushed. Not away from the predator. Into it.

  His spike punctured the pseudopod's membrane with a soft pop that he felt through his entire body. The predator recoiled. The damaged arm snapped back like a burnt hand pulling from a stove.

  Andy had hurt it. A little. Barely. He had, at best, given a giant a paper cut with his tiny, rigid protrusion. Phrasing. He really needed someone around to appreciate the phrasing.

  The predator extended a second pseudopod. This time from the other side.

  Then a third. From below.

  It was flanking him. An amoeba was flanking him. An organism with no brain, no nervous system, no tactical training, was employing a multi-directional envelopment strategy against a target that had a pointy stick and a human mind, and the human mind was losing because the human mind was very good at overthinking and very bad at being surrounded on three sides by a bag of digestive enzymes the size of a swimming pool (relative to him, everything was relative, at this scale a raindrop would be a tsunami and Andy really wished his brain would stop doing comparative math and start doing survival math).

  He stabbed the second pseudopod. It recoiled. The third one kept coming.

  There were no good options. The spike could only point in one direction. The predator was coming from three. In about four seconds, the pseudopods were going to close around him, and his entire second life was going to end inside the belly of an amoeba in a nameless pond.

  Andy did the only thing he could think of. The Hail Mary. The "I can't believe this worked" play that you pull off once in a hundred attempts and talk about for years.

  He charged.

  Not away from the predator. Through it.

  Spike first, full speed (which was the speed of a very motivated bacterium, so "full speed" was generous), he drove himself directly into the approaching pseudopod and punched through the membrane before it could reseal. The predator's insides closed around him for one horrifying second, thick and warm and wrong, digestive enzymes eating at his outer membrane, and then he was out the other side, trailing debris, his whole body stinging with chemical burns. He had just gone in one end and come out the other. Of an amoeba. He was not going to think about how that sounded.

  [NARROW ESCAPE!]

  [SURVIVAL BONUS: +5 XP]

  [DAMAGE TAKEN: MEMBRANE INTEGRITY 74%]

  He was alive. Damaged, leaking, but alive. The predator, confused by prey that had charged through it instead of running (most cells did not use "offensive retreat through the enemy's body" as a survival strategy), drifted away to find easier food.

  Andy floated in the warm water and let his membrane heal.

  He had nearly died. Again. Truck the first time. Giant cell the second. Different scale, same result if he'd been slower.

  [XP: 31/50]

  Thirty-one out of fifty. The survival bonus had been generous (five XP for not dying, which felt like being tipped for showing up to work), and his membrane was regenerating.

  He needed to be smarter. Faster. More aware. The pond was not a tutorial zone. The pond was a competitive ecosystem where everything ate everything else and the only safe organism was the one that was either too big to be prey or too dangerous to be worth the effort, and Andy, with his single calcium spike and his stolen human consciousness, was neither. Not yet.

  But the spike had saved him. The pointy option. The DPS choice. It had punctured a predator and bought him the fraction of a second he needed to survive. Membrane Hardening wouldn't have done that. A flagellum might have let him run, but running from something that flanked on three sides was a losing proposition. The spike had given him an option that defense or speed wouldn't have.

  He had chosen correctly.

  Andy resumed hunting with new caution and a fresh appreciation for the little protrusion that had saved his life, and as he drifted through the warm water poking things and absorbing their contents, he noticed something.

  The spike was slightly larger than before.

  Not dramatically. But the structure had thickened, the calcium lattice denser and more organized than before the fight. His spike, his first and only weapon, was growing. Getting longer. Harder. More rigid.

  Horny, he thought.

  He let the pun sit there in the silence of his single-celled existence. No one laughed. No one could laugh. He was alone in a pond with a spike that was getting bigger every time he used it, and the jokes were writing themselves, and he was the only audience.

  The loneliest comedian in evolutionary history.

  [XP: 47/50]

  Three more.

  He found a cluster of cells huddled in a thermal vent, fat and slow and warm, living their best prokaryotic lives in blissful ignorance of the spike-wielding maniac drifting toward them from the cooler water above. Guilt pinched him, entirely human and entirely useless, and pierced the first one before the guilt could turn into hesitation.

  [XP: 50/50]

  [TIER EVOLUTION AVAILABLE!]

  [CONGRATULATIONS! YOU HAVE REACHED THE THRESHOLD FOR TIER 1 EVOLUTION.]

  [YOU WILL NOW CHOOSE YOUR EVOLUTIONARY PATH.]

  [THIS CHOICE IS PERMANENT AND WILL DETERMINE YOUR ORGANISM TYPE FOR TIER 2.]

  [CHOOSE WISELY.]

  The "choose wisely" was a nice touch. Very ominous. Very RPG. Andy half-expected a dramatic musical sting to follow, but the System didn't do musical stings. If he wanted background music, he'd have to hum. He did not have a mouth.

  [EVOLUTIONARY PATHS:]

  [1. AUTOTROPH] - The path of self-sustenance. Develop photosynthetic or chemosynthetic capabilities. Generate your own energy from light or chemical sources. Reduced need for predation. Opens paths toward: Plant-type organisms, Coral-type organisms, Fungal networks.

  [2. HETEROTROPH] - The path of consumption. Specialize in hunting, absorbing, and metabolizing other organisms. Enhanced predatory capabilities. Opens paths toward: Animal-type organisms, Predatory colonies, Apex fauna.

  [3. MIXOTROPH] - The path of flexibility. Develop both autotrophic and heterotrophic capabilities. Jack of all trades, master of none. Reduced specialization bonuses. Opens paths toward: Hybrid organisms, Adaptive colonies, Rare evolutionary branches. [NOTE: THIS PATH IS UNCOMMON AND MAY LIMIT TIER-SPECIFIC BONUSES.]

  Andy read the options three times, because reading things three times was what he did, and then he read the fine print of each option, and then he sat (floated) with the decision for a while, turning it over in whatever passed for his mind these days.

  Autotroph was the pacifist build. Make your own food, no killing required. Plants, corals, fungi. Organisms that grew in place and absorbed sunlight and contributed to the ecosystem without taking from it.

  It was the choice that the Andy of his human life, the spider-relocator, the Pixar-crier, would have been expected to make.

  He did not even consider it for a full second.

  Mixotroph was the hybrid build. A little of everything, master of nothing. Andy knew from extensive gaming experience that "jack of all trades" was designer code for "this option is a trap that sounds versatile and plays like mediocrity." The uncommon tag was intriguing, but the reduced specialization bonuses were a dealbreaker. He was a single-celled organism in a competitive ecosystem. Being kind of good at everything was being kind of dead in short order.

  Heterotroph. The path of consumption. Enhanced predatory capabilities. Opens toward animal-type organisms.

  Animal-type organisms.

  Not plants. Not fungi. Not coral. Animals. Creatures that moved, that hunted, that had bodies with limbs and nervous systems and, eventually, at the very far end of the evolutionary tree, the kind of complex biological architecture that included things like hands and vocal cords and the capacity to stand upright in a room and be recognized as a person.

  Andy chose Heterotroph with the speed of a man who had been choosing since before the options appeared. Animals had bodies. Bodies had limbs. Limbs were the road back to anything resembling the life he had lost on a crosswalk where the signal was green.

  "I didn't reincarnate to photosynthesize," he thought, and the thought landed like a mission statement. Besides, he'd already grown a horn, learned to thrust, and reproduced. He was on a roll. A deeply weird, biologically confusing roll, but a roll nonetheless.

  [HETEROTROPH: SELECTED]

  [TIER 1 EVOLUTION COMPLETE]

  [NEW ABILITIES UNLOCKED:]

  [ACTIVE HUNTING] - Detect and pursue prey organisms using enhanced chemoreception. Tracking range: Short.

  [PSEUDOPOD FORMATION] - Temporarily extend cytoplasmic protrusions for grasping, manipulation, or additional movement.

  [ENHANCED ABSORPTION] - Increased efficiency when absorbing nutrients from defeated organisms. +50% nutrient yield from kills.

  [CALCIUM SPIKE: RETAINED AND ENHANCED] - Spike damage increased. Piercing efficiency improved. Horn morphology: Active.

  That last line. Calcium Spike: Retained and Enhanced. The System had carried his spike through the evolution. Not replaced it, not absorbed it, but kept it and made it better. The phrase "horn morphology: active" appeared again, the same tag from before, and once again Andy filed it away without examination because he was too busy appreciating the upgrade. The new version was noticeably sharper, longer, and oriented at the leading edge of his cell body like the prow of a very small warship. His horn was bigger. Harder. More impressive. He was choosing to feel good about that and not to think about the metaphor.

  He was a heterotroph now. A predator with a spike and pseudopods and enhanced absorption and active hunting, floating in a warm pond with an XP counter reset to zero and a new milestone glowing in his awareness like a checkpoint in a game that he was beginning, against all reason and basic dignity, to enjoy.

  [XP: 0/100]

  [NEXT MILESTONE: TIER 2 EVOLUTION]

  One hundred XP to the next tier. The numbers were getting bigger. The stakes were getting higher. And the pond, with its chemical gradients and thermal vents and predatory amoebas and teeming billions of cells, was no longer a prison.

  It was a leveling zone.