Shilgengar, Sire of Famine

Two sacrifice engines wearing the same body, and the tension between them is the whole design. The first line converts any creature into a Blood token, a fodder-to-resource pump that turns aristocrat decks into Blood factories one death at a time. But the clause that rewards sacrificing an Angel (Blood equal to its toughness) reveals the intended fuel: this is an Angel payoff dressed as a demon, asking you to feed your biggest fliers into the maw to bank the six Blood the second ability demands. That second ability is where the payoff lands. Spending six Blood and three hybrid white-or-black mana returns every creature card from your graveyard at once, a Living Death that costs Blood instead of the graveyard's contents. The finality counters are the discipline that keeps the loop from spiraling: each returned creature can only die once more before exile, so the mass reanimation is a one-shot detonation, not an engine you rebuild every turn. The Vampire type-change is the flavor tax on top, mostly relevant to tribal builds but a reminder of what this creature thinks it is turning your dead into. The hybrid activation cost is the quiet key: it makes the reanimation reachable in mono-black while the Angel synergy points toward white, so the card sits at a genuine two-color seam rather than committing to either. Feed it angels, bank the Blood, and empty the yard in a single swing.