Mawloc

The X in the cost buys two things at once. Ravenous turns it into +1/+1 counters (and, at five or more, a card off the top), so the same mana that grows the body decides how hard it can bite. But the removal lives in a separate clause: Terror from the Deep resolves an entering fight against an opposing creature, and whatever dies to it gets exiled instead of hitting the graveyard. That split is where the card gets clever. Green-red's oldest removal problem is that fight is a two-way exchange: your creature takes the damage back, and pointing it at anything worth killing risks a mutual trade. Loading the counters through the X cost is what tilts that math in your favor, letting the 2/2 base arrive as a 7/7 or larger that survives the return swing. The exile rider then does the second job, pushing the effect past a normal fight spell by dodging death triggers and graveyard recursion entirely. And because the counter investment is the same investment that unlocks the card draw at the top end, a single cast can clear a blocker, land a threat that outsizes the board, and refill the hand. Three functions stapled to one creature, and the counters are the connective tissue: they keep the fight favorable, they build the body, and past a threshold they pay you back for going big.