Midnight Covenant

Enchant creature
Enchanted creature has “: This creature gets +1/+1 until end of turn.”

Purge

Destroy target artifact creature or black creature. It can’t be regenerated.

Ebon Drake

Flying
Whenever a player casts a spell, you lose 1 life.

Leonin Squire

When Leonin Squire enters the battlefield, return target artifact card with converted mana cost 1 or less from your graveyard to your hand.

Desecration Elemental

Fear (This creature can’t be blocked except by artifact creatures and/or black creatures.)
Whenever a player casts a spell, sacrifice a creature.

Raksha Golden Cub

Vigilance
As long as Raksha Golden Cub is equipped, Cat creatures you control get +2/+2 and have double strike.

Purge

Destroy target artifact creature or black creature. It can’t be regenerated.

Vulshok War Boar

When Vulshok War Boar enters the battlefield, sacrifice it unless you sacrifice an artifact.

Scrounge

Target opponent chooses an artifact card in their graveyard. Put that card onto the battlefield under your control.

Tears of Rage

Cast this spell only during the declare attackers step.
Attacking creatures you control get +X/+0 until end of turn, where X is the number of attacking creatures. Sacrifice those creatures at the beginning of the next end step.

Tanglewalker

Each creature you control can’t be blocked as long as defending player controls an artifact land.

Time Warp

Target player takes an extra turn after this one.

Vulshok Berserker

Haste (This creature can attack and as soon as it comes under your control.)

Wrench Mind

Target player discards two cards unless they discard an artifact card.

Megatog

Sacrifice an artifact: Megatog gets +3/+3 and gains trample until end of turn.

Gate to the Aether

At the beginning of each player’s upkeep, that player reveals the top card of their library. If it’s an artifact, creature, enchantment, or land card, the player may put it onto the battlefield.

Skyhunter Cub

As long as Skyhunter Cub is equipped, it gets +1/+1 and has flying.

Death Pit Offering

When Death Pit Offering enters the battlefield, sacrifice all creatures you control.
Creatures you control get +2/+2.

Invisibility

Enchant creature
Enchanted creature can’t be blocked except by Walls.

Tremor

Tremor deals 1 damage to each creature without flying.

Lhurgoyf

Lhurgoyf’s power is equal to the number of creature cards in all graveyards and its toughness is equal to that number plus 1.