Erebos, Bleak-Hearted

Every God in this cycle sits behind a devotion gate, but the version of that gate wired to sacrifice is where the design gets pointed. As long as your black devotion stays under five, this is a static enchantment: an indestructible card-draw engine that can't be attacked into or answered by creature removal, quietly turning each of your creatures' deaths into a two-life-for-a-card transaction. Cross the threshold and it stands up as a 5/6 that is still indestructible, so the reward for committing to black is a body that most decks simply cannot kill. The sacrifice ability closes the loop: it pays for itself in card advantage, because the creature you feed to the -2/-1 becomes another death trigger, another optional draw. That is the aristocrats engine folded into a single legendary permanent. The life payments are the discipline the whole package runs on. Every card drawn costs two, every activation costs the creature you sacrifice, and the God only exists as a threat when you've already flooded the board with black permanents. It asks you to spend life and bodies you already have, then hands both back as cards. Erebos, God of the Dead handled the top-deck-denial and inevitability angle of the same figure; this rendering is the one built for a graveyard-and-sacrifice deck that wants an engine it can't lose to a Wrath.