Ghoulcaller Gisa

The conversion engine for the aristocrat that wants width rather than depth. Most sacrifice payoffs reward you for the death trigger itself: a drain, a card, a counter. Gisa instead converts a creature's power into bodies, turning one big attacker into a swarm of 2/2 Zombies sized to whatever you fed her. Each activation asks for a black mana, the tap, and another creature off the board, so the trade is real: you spend a body to get bodies, but you get them at a multiplier equal to the sacrificed creature's power. The design tension she resolves is the one every sacrifice deck runs into, that fodder eventually runs dry; Gisa answers it by making the fodder reproduce, so a single large creature seeds an army and that army feeds her again. Pumping power before the sacrifice (an Aura, a counter, a buff that doubles as removal) bends the math sharply in your favor, and a 3/4 body is sturdy enough to weather incidental damage between activations. Among mono-black zombie-aristocrat commanders she is the one who builds the team rather than draining the table, the proliferation of bodies standing in for the drain other black sacrifice engines lean on. Her brother Geralf works the other side of the graveyard, reanimating what dies; Gisa is the one who turns death into numbers.