Theros Beyond Death

Enemy of Enlightenment | Enchantment Creature | Demon | Flying Enemy of Enlightenment gets -1/-1 for each card in your opponents' hands. At the beginning of your upkeep, each player discards a card. | James Ryman

Gray Merchant of Asphodel | Creature | Zombie | When Gray Merchant of Asphodel enters the battlefield, each opponent loses X life, where X is your devotion to black. You gain life equal to the life lost this way. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) | Scott Murphy

Hateful Eidolon | Enchantment Creature | Spirit | Lifelink Whenever an enchanted creature dies, draw a card for each Aura you controlled that was attached to it. | Daniel Ljunggren

Mire Triton | Creature | Zombie Merfolk | Deathtouch When Mire Triton enters the battlefield, mill two cards and you gain 2 life. | Seb McKinnon

Pharika's Spawn | Creature | Gorgon | Escape—{5}{B}, Exile three other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.) Pharika's Spawn escapes with two +1/+1 counters on it. When it enters the battlefield this way, each opponent sacrifices a non-Gorgon creature. | Vincent Proce

Tymaret, Chosen from Death | Legendary Enchantment Creature | Demigod | Tymaret's toughness is equal to your devotion to black. (Each {B} in the mana costs of permanents you control counts toward your devotion to black.) {1}{B}: Exile up to two target cards from graveyards. You gain 1 life for each creature card exiled this way. | Chase Stone

Devourer of Memory | Creature | Nightmare | Whenever one or more cards are put into your graveyard from your library, Devourer of Memory gets +1/+1 until end of turn and can't be blocked this turn. {1}{U}{B}: Mill a card. | Daarken

Slaughter-Priest of Mogis | Creature | Minotaur Shaman | Whenever you sacrifice a permanent, Slaughter-Priest of Mogis gets +2/+0 until end of turn. {2}, Sacrifice another creature or an enchantment: Slaughter-Priest of Mogis gains first strike until end of turn. | Steve Prescott

Acolyte of Affliction | Creature | Human Cleric | When Acolyte of Affliction enters the battlefield, mill two cards, then you may return a permanent card from your graveyard to your hand. | Chase Stone