Kilo, Apogee Mind

The trigger condition is the design move here, not the proliferate itself. Most counter-manipulation payoffs ask for an activation, a spell cast, or an end step to arrive; this one keys off tapping, something that happens naturally the moment a creature turns sideways. Attack, and proliferate. Tap it to a convoke, a crew cost, or any activated ability that demands a tap, and proliferate on the way. Haste means the tapping starts the turn it lands. The result is a proliferate engine that fires as a byproduct of normal play rather than a resource you spend. Because a creature can only tap once until it untaps, chaining multiple triggers in a single turn is not a matter of stacking tap outlets: it requires untap effects to reset the body, which turns any repeatable untapper into a proliferate loop. That reframes what proliferate is for. As a one-shot spell rider it nudges a planeswalker or a lone +1/+1 counter; as a repeatable trigger it compounds across every counter type on the board at once, so the deck built around it decides what proliferate does, whether that is loyalty, charge counters on artifacts, poison, experience, or a slow-cooked +1/+1 grid. The 3/3 body is deliberately unremarkable: the card is a rules text stapled to something that can attack, and its power lives in how often you can convince it to tap for value beyond combat.