Fire Covenant

As an additional cost to cast this spell, pay X life.
Fire Covenant deals X damage divided as you choose among any number of target creatures.

Ritual of the Machine

As an additional cost to cast this spell, sacrifice a creature.
Gain control of target nonartifact, nonblack creature.

Bone Shaman

{B}: Until end of turn, Bone Shaman gains "Creatures dealt damage by Bone Shaman this turn can't be regenerated this turn."

Pyroclasm

Pyroclasm deals 2 damage to each creature.

Lim-Dûl's Paladin

Trample
At the beginning of your upkeep, you may discard a card. If you don't, sacrifice Lim-Dûl's Paladin and draw a card.
Whenever Lim-Dûl's Paladin becomes blocked, it gets +6/+3 until end of turn.
Whenever Lim-Dûl's Paladin attacks and isn't blocked, it assigns no combat damage this turn and defending player loses 4 life.

Dark Banishing

Destroy target nonblack creature. It can't be regenerated.

Abyssal Specter

Flying
Whenever Abyssal Specter deals damage to a player, that player discards a card.

Retribution

Choose two target creatures controlled by the same opponent. That player chooses and sacrifices one of those creatures. Put a -1/-1 counter on the other.

Sulfurous Springs

{T}: Add {C}.
{T}: Add {B} or {R}. Sulfurous Springs deals 1 damage to you.

Fumarole

As an additional cost to cast this spell, pay 3 life.
Destroy target creature and target land.

Lava Tubes

Lava Tubes doesn't untap during your untap step if it has a depletion counter on it.
At the beginning of your upkeep, remove a depletion counter from Lava Tubes.
{T}: Add {B} or {R}. Put a depletion counter on Lava Tubes.

Orcish Cannoneers

{T}: Orcish Cannoneers deals 2 damage to any target and 3 damage to you.

Gangrenous Zombies

{T}, Sacrifice Gangrenous Zombies: Gangrenous Zombies deals 1 damage to each creature and each player. If you control a snow Swamp, Gangrenous Zombies deals 2 damage to each creature and each player instead.

Incinerate

Incinerate deals 3 damage to any target. A creature dealt damage this way can't be regenerated this turn.

Snow-Covered Mountain

Koskun Keep

{T}: Add {C}.
{1}, {T}: Add {R}.
{2}, {T}: Add {B} or {G}.

Snow-Covered Swamp

Lava Burst

Lava Burst deals X damage to any target. If Lava Burst would deal damage to a creature, that damage can't be prevented or dealt instead to another permanent or player.

Mountain Titan

{1}{R}{R}: Until end of turn, whenever you cast a black spell, put a +1/+1 counter on Mountain Titan.

Balduvian Dead

{2}{R}, Exile a creature card from your graveyard: Create a 3/1 black and red Graveborn creature token with haste. Sacrifice it at the beginning of the next end step.

Soul Burn

Spend only black and/or red mana on X.
Soul Burn deals X damage to any target. You gain life equal to the damage dealt, but not more than the amount of {B} spent on X, the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.