Cole Eastburn

A boggart's mind is a tinderbox of volatile thoughts, hungry for a spark.

Outrage Shaman

Chroma When Outrage Shaman comes into play, it deals damage to target creature equal to the number of red mana symbols in the mana costs of permanents you control.

Chroma — When this creature enters, it deals damage to target creature equal to the number of red mana symbols in the mana costs of permanents you control.

Witches of the Split-Eye Coven speak of a future when Grixis will overflow with life energy. For now, they must harvest vis from the living to fuel their dark magics.

Bone Splinters

As an additional cost to play Bone Splinters, sacrifice a creature.
Destroy target creature.

As an additional cost to cast this spell, sacrifice a creature.
Destroy target creature.

Creakwood Liege

Other black creatures you control get +1/+1.
Other green creatures you control get +1/+1.
At the beginning of your upkeep, you may create a 1/1 black and green Worm creature token.

Sedraxis Specter

Flying
Whenever this creature deals combat damage to a player, that player discards a card.
Unearth {1}{B} ({1}{B}: 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.)

"I will make your bones into a weapon that will lay even the mighty low."
—Modriss of Zargoth Fen

Underneath the Dregscape lay the remains of creatures long extinct from Grixis.

Viashino Skeleton

{1}{B}, Discard a card: Regenerate this creature.

Skulkins confer strange benefits on unsuspecting patrons.

Shell Skulkin

{3}: Target blue creature gains shroud until end of turn. (It can't be the target of spells or abilities.)