As long as your devotion to black is less than five, Erebos isn't a creature. (Each in the mana costs of permanents you control counts toward your devotion to black.)
Your opponents can't gain life.
, Pay 2 life: Draw a card.
Erebos turns life into a resource engine, letting you pay life to refill your hand while denying opponents lifegain to keep aggressive and combo strategies in check. You play a mono-black midrange/aristocrats game: drain opponents, recur threats from the graveyard, and grind them out with relentless card advantage. Close games with big finishers or repeatable drain effects once you've outpaced everyone on cards.
Built-in card draw engine that's hard to interact with since Erebos is indestructible
Lifegain hatred shuts down many lifegain-based combo and stax pieces
Mono-black gives access to powerful tutors, recursion, and ramp
Devotion to black makes Erebos a hard-to-kill attacker once you commit to the color
Paying 2 life per card is punishing without lifegain support of your own
Mono-black struggles to deal with resolved enchantments and artifacts
Exile-based removal and bounce bypass Erebos's indestructibility
Color identity limits access to versatile interaction and protection
Doubles black mana for explosive ramp toward both Erebos's ability and big spells.
Add fast mana and ritual effects (Dark Ritual, Cabal Coffers, Nykthos) to deploy threats ahead of curve and abuse Erebos's draw. Lean into a tighter combo finish like Exsanguinate plus mana doublers or a Bolas's Citadel loop, and include lifegain like Whip of Erebos to offset the life cost. Upgrade interaction with premium removal and tutors (Demonic Tutor, Vampiric Tutor) to assemble your win reliably.