Ravenous Bloodseeker
Most pump abilities buy power for free; this one charges you two toughness every time, so the printed 1/3 body is functioning as an ammunition clip. One activation makes it a 3/1, which lives; a second sends the toughness below zero unless something outside the card has padded it, and since each swing costs two toughness, you need two points of external buff to earn one more +2. That is why the ability can be pushed repeatedly: the limiter is the creature's own margin of survival, not a counter or a once-per-turn clause. The repeatable discard makes it a natural outlet for graveyard decks, which want cards in the yard anyway, but the fragile frame means it's a finisher rather than a grind engine: it spends itself to close, not to accrue. The quiet interaction is with anthems and toughness boosts, which convert directly into extra activations the text never advertises. Every combat it poses the same question at two mana: how much damage do you need right now, and how much of the creature are you willing to burn to get it?
