Feast of Blood

Unconditional creature destruction at two mana is something black almost never gets to print without a string attached, and here the string is a tribal gate rather than a downside on the spell itself. The condition lives in the casting step: you can only put this on the stack while you control two or more Vampires, but once it is cast it resolves regardless of what happens to your board afterward. That distinction matters, because the restriction does its work at the moment of commitment rather than as a resolution check; an opponent who kills your Vampires in response has done nothing to stop the destroy. The gate locks the card to a single archetype and prices its power in board presence instead of life, cards, or tempo. That is a different tax than the usual black removal pays. Doom Blade and its descendants narrow the target; Sign in Blood and its kin charge life for value. This charges nothing once the gate is open, then hands you four life on top, which is the rare case of premium removal that also stabilizes the caster's clock. The design logic reads as a payoff rather than a removal spell: it rewards a board state a Vampire deck wants anyway and sits dead in every other shell. Strip the gate and the rate would be flatly broken for its era; keep it and the card becomes a build-around incentive, power priced in tribal density.