Managorger Hydra

The growth clock that doesn't care who's casting. Most counter-accumulating creatures key off your own deck's actions: your spells, your creatures dying, your attacks landing. This one taxes the entire table, because every spell anyone casts, friend or foe, removal aimed at it included, feeds another +1/+1 counter. That symmetry is the design tension. The card starts as a 1/1 that any one-mana spell can kill, but the window to kill it cleanly is the narrowest part of any game: pass the turn and the opponent's own interaction enlarges it, hold up removal and you've left it alone long enough to outgrow the answer. Trample is what converts the accumulation into a threat that can't be chump-blocked into irrelevance, so the counter math becomes lethal math fast. The discipline built into it is the fragile body: three mana buys you nothing but a 1/1 and a promise, and the promise only pays off in a game with enough spell velocity to feed it. In a grindy, interaction-heavy table it snowballs precisely because everyone is doing something every turn; in a quiet game it sits there small. It is the rare growth engine that punishes the format's own pace rather than the controller's effort, and the only real way to stop it is to do nothing at all, which is a thing decks are very bad at.