Skarrgan Skybreaker

The whole card is a bet on whether you have already connected by the time it resolves. Land any damage on an opponent earlier in the turn (a single point clears the bloodthirst threshold) and it arrives with three +1/+1 counters, turning a 3/3 into a 6/6 that carries its own finisher: the sacrifice ability deals damage equal to current power, so a counter-loaded body converts directly into six points aimed wherever you need them. Miss the threshold and you have paid seven mana for a 3/3 whose sacrifice clause still works but reads off a much smaller number. That gap between the two outcomes is the entire design. Bloodthirst at this magnitude is the keyword's loudest tier, asking the most counters of any version of the mechanic, and the sacrifice ability is what makes the gamble worth chasing: the counters do not merely build a bigger attacker, they load the burn. It sits in a line of red-green payoffs whose stat line is contingent on board state you have already established rather than mana you spent. The reward is for tempo you earn, not tempo you buy, and once that tempo exists, the card translates a swing of counters into reach you can point at an opposing planeswalker, a blocker, or the player on the other side. Built for a board you are already winning and a turn where you want to cash the lead into immediate damage.