Gristleback

Bloodthirst rewards aggression by punishing the opponent who already let the damage through, and here the design pairs that reward with a way to bank it. Lead with damage and the boar arrives a 3/3; sacrifice it for life equal to its power and you turn a swung-in beater into a buffer against the very tempo you spent building it. That second clause is the wrinkle that makes the card more than a stat-padded body: it lets an aggressive deck convert a creature it no longer needs into a cushion, scaling the lifegain to whatever the bloodthirst counter (or any other pump) left on board. The tension is real and a little self-defeating, which is the point. An all-out red-green beatdown wants the bloodthirst bonus, but a deck mauling its opponent rarely wants to trade a body for life. The card is built for the midgame pivot: the moment a race tilts and a spare creature is worth more as four or five life than as two more points of pressure. As a Boar Beast it slots into green's recurring tribal hooks without asking much, and the sacrifice ability needs no outlet of its own, which keeps it serviceable in decks that otherwise lack a way to cash in a creature on demand.