Wildborn Preserver

Most creatures that scale off your other permanents entering are static engines: you build the board, they grow, and the opponent knows exactly what they are staring down. Flash breaks that predictability. Leaving mana open and passing your turn lets the opponent commit to a swing or a removal spell, and only then do you decide whether this belongs on the battlefield at all. Arrive during combat and reach lets it ambush an attacking flier; hold it until the opponent's turn winds down and the pay- counter ability turns leftover mana into permanent stats the moment your next non-Human body lands. That mana sink is the reactive half of the card: flooded late-game turns that would otherwise stall out instead convert into raw size, one payment at a time. What paces the growth is the wording of the trigger itself. Each counter payment fires only off another non-Human creature entering, so the card scales with sustained board development rather than detonating on a single turn; there is no way to point a fistful of mana at it in isolation and end the game. It sits at the seam between an aggressive engine that snowballs alongside your other threats and a flash reach-blocker that trades up on defense, and the pilot chooses which role it plays each turn based on what mana is open and what the opponent has committed.