Forest

Coldsteel Heart

Coldsteel Heart enters tapped.
As Coldsteel Heart enters, choose a color.
{T}: Add one mana of the chosen color.

Deepfire Elemental

{X}{X}{1}: Destroy target artifact or creature with mana value X.

Void Maw

Trample
If another creature would die, exile it instead.
Put a card exiled with Void Maw into its owner's graveyard: Void Maw gets +2/+2 until end of turn.

Sek'Kuar, Deathkeeper

Whenever another nontoken creature you control dies, create a 3/1 black and red Graveborn creature token with haste.

Death Spark

Death Spark deals 1 damage to any target.
At the beginning of your upkeep, if Death Spark is in your graveyard with a creature card directly above it, you may pay {1}. If you do, return Death Spark to your hand.

Mountain

Insidious Bookworms

When Insidious Bookworms dies, you may pay {1}{B}. If you do, target player discards a card at random.

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.

Gristle Grinner

Whenever a creature dies, Gristle Grinner gets +2/+2 until end of turn.

Dark Banishing

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

Orcish Bloodpainter

{T}, Sacrifice a creature: Orcish Bloodpainter deals 1 damage to any target.

Casting of Bones

Enchant creature
When enchanted creature dies, draw three cards, then discard one of them.

Skull Catapult

{1}, {T}, Sacrifice a creature: Skull Catapult deals 2 damage to any target.

Ashen Ghoul

Haste
{B}: Return Ashen Ghoul from your graveyard to the battlefield. Activate only during your upkeep and only if three or more creature cards are above Ashen Ghoul.

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.

Grim Harvest

Return target creature card from your graveyard to your hand.
Recover {2}{B} (When a creature is put into your graveyard from the battlefield, you may pay {2}{B}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)

Barbed Sextant

{1}, {T}, Sacrifice Barbed Sextant: Add one mana of any color. Draw a card at the beginning of the next turn's upkeep.

Swamp

Disciple of Tevesh Szat

{T}: Target creature gets -1/-1 until end of turn.
{4}{B}{B}, {T}, Sacrifice Disciple of Tevesh Szat: Target creature gets -6/-6 until end of turn.

Gutless Ghoul

{1}, Sacrifice a creature: You gain 2 life.

Orcish Healer

{R}{R}, {T}: Target creature can't be regenerated this turn.
{B}{B}{R}, {T}: Regenerate target black or green creature.
{R}{G}{G}, {T}: Regenerate target black or green creature.

Kjeldoran Dead

When Kjeldoran Dead enters, sacrifice a creature.
{B}: Regenerate Kjeldoran Dead.

Krovikan Rot

Destroy target creature with power 2 or less.
Recover {1}{B}{B} (When a creature is put into your graveyard from the battlefield, you may pay {1}{B}{B}. If you do, return this card from your graveyard to your hand. Otherwise, exile this card.)