Wandering Goblins

Domain — : Wandering Goblins gets +1/+0 until end of turn for each basic land type among lands you control.

Malfegor

Flying
When Malfegor enters the battlefield, discard your hand. Each opponent sacrifices a creature for each card discarded this way.

Slave of Bolas

Gain control of target creature. Untap that creature. It gains haste until end of turn. Sacrifice it at the beginning of the next end step.

Skeletonize

Skeletonize deals 3 damage to target creature. When a creature dealt damage this way dies this turn, create a 1/1 black Skeleton creature token with “: Regenerate this creature.”

Blood Cultist

: Blood Cultist deals 1 damage to target creature.
Whenever a creature dealt damage by Blood Cultist this turn dies, put a +1/+1 counter on Blood Cultist.

Demon’s Herald

, , Sacrifice a blue creature, a black creature, and a red creature: Search your library for a card named Prince of Thralls and put it onto the battlefield. Then shuffle your library.

Swerve

Change the target of target spell with a single target.

Infest

All creatures get -2/-2 until end of turn.

Hell’s Thunder

Flying, haste
At the beginning of the end step, sacrifice Hell’s Thunder.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)