Drekavac

That discard reads like an entry fee, not a printed cost, and the difference governs everything the body asks of you. You pay two mana for a 3/3, then the creature holds itself hostage on resolution until you ditch a noncreature card from hand. In a vacuum that's a steep ask, but the design assumes you have noncreature cards you'd rather see in the graveyard than the library: a flashback spell, a sorcery with retrace, anything that converts a forced discard into deferred value. The noncreature restriction tightens the deckbuilding ask, since you cannot satisfy the trigger by binning a creature you wanted in the yard anyway. This is not a free pitch outlet for a reanimation pile; it wants a shell where the surplus you'd happily discard sits on the spell side of the deck. Timing is the trap: the discard happens on the enters-the-battlefield resolution, so an empty grip or a hand of nothing but creatures turns the beast into a self-immolating blank. That fragility is what keeps the rate from being free. A 3/3 for two with no drawback would distort an aggressive curve; bolting a hand-cost to the front end prices the body back down to something a midrange or graveyard-leaning deck has to build toward rather than simply slot in. Anyone reaching for it as a generic beater gets punished for the assumption.