Caldera Pyremaw

This is a burn engine dressed as a beater, and the ordering of its trigger is the whole design. Cast an instant or sorcery, grow the Dragon, and only then does it fling its new power at an opponent's face: the counter lands before the damage, so each spell you chain hits for one more than the last. The escalation is self-reinforcing, which means the card rewards a deck stuffed with cheap cantrips and rituals rather than a handful of expensive haymakers; four one-mana spells out of this thing do far more than one four-mana bomb. Note the target restriction, too. The damage can only point at a player, never a creature or planeswalker, so this is not a removal engine masquerading as a threat; it is a dedicated clock that closes games from the air while your spellslinging does its normal work. The flying body matters less for the beatdown than for survival: a 3/3 that keeps ballooning wants to stick around long enough for the counters to compound, and evasion keeps it from trading into the ground. The tension the design resolves is the classic spellslinger problem of a payoff that sits on the battlefield doing nothing between your spells. Here the creature is never idle by choice; every card you were already casting feeds it, and the reach it generates scales with how hard you were leaning into instants and sorceries anyway.