Crypt Rats

{X}: Crypt Rats deals X damage to each creature and each player. Spend only black mana on X.

Utopia Sprawl

Enchant Forest
As Utopia Sprawl enters, choose a color.
Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.

Unexpected Fangs

Put a +1/+1 counter and a lifelink counter on target creature.

Arbor Elf

Haunted Mire

({T}: Add {B} or {G}.)
Haunted Mire enters tapped.

Thorn of the Black Rose

Deathtouch
When Thorn of the Black Rose enters, you become the monarch.

Deglamer

Choose target artifact or enchantment. Its owner shuffles it into their library.

Avenging Hunter

Trample
When Avenging Hunter enters, you take the initiative.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Swamp

Nihil Spellbomb

{T}, Sacrifice Nihil Spellbomb: Exile target player's graveyard.
When Nihil Spellbomb is put into a graveyard from the battlefield, you may pay {B}. If you do, draw a card.

Weather the Storm

You gain 3 life.
Storm (When you cast this spell, copy it for each spell cast before it this turn.)

Echoing Decay

Target creature and all other creatures with the same name as that creature get -2/-2 until end of turn.

Entourage of Trest

When Entourage of Trest enters, you become the monarch.
Entourage of Trest can block an additional creature each combat as long as you're the monarch.

Cast Down

Forest

Woodland Chasm

({T}: Add {B} or {G}.)
Woodland Chasm enters tapped.

Arms of Hadar

Creatures target player controls get -2/-2 until end of turn.

Dark Ritual

Jewel Thief

Vigilance, trample
When Jewel Thief enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")

Diabolic Edict

Target player sacrifices a creature of their choice.

Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)