Face of Fear

{2}{B}, Discard a card: This creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Dwarven Strike Force

Discard a card at random: This creature gains first strike and haste until end of turn.

Swamp

Famished Ghoul

{1}{B}, Sacrifice this creature: Exile up to two target cards from a single graveyard.

Crypt Creeper

Sacrifice this creature: Exile target card from a graveyard.

Halberdier

Barbarian Lunatic

{2}{R}, Sacrifice this creature: It deals 2 damage to target creature.

Ravaged Highlands

This land enters tapped.
{T}: Add {R}.
{T}, Sacrifice this land: Add one mana of any color.

Flame Burst

Flame Burst deals X damage to any target, where X is 2 plus the number of cards named Flame Burst in all graveyards.

Cabal Pit

{T}: Add {B}. This land deals 1 damage to you.
Threshold — {B}, {T}, Sacrifice this land: Target creature gets -2/-2 until end of turn. Activate only if seven or more cards are in your graveyard.

Childhood Horror

Flying
Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and can't block.

Mountain

Repentant Vampire

Flying
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.
Threshold — As long as seven or more cards are in your graveyard, this creature is white and has "{T}: Destroy target black creature."

Reckless Charge

Target creature gets +3/+0 and gains haste until end of turn.
Flashback {2}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Bog Wreckage

This land enters tapped.
{T}: Add {B}.
{T}, Sacrifice this land: Add one mana of any color.

Thermal Blast

Thermal Blast deals 3 damage to target creature.
Threshold — Thermal Blast deals 5 damage instead if seven or more cards are in your graveyard.

Ghastly Demise

Destroy target nonblack creature if its toughness is less than or equal to the number of cards in your graveyard.

Shadowblood Egg

{2}, {T}, Sacrifice this artifact: Add {B}{R}. Draw a card.

Firebolt

Firebolt deals 2 damage to any target.
Flashback {4}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Pardic Firecat

Haste
If this card is in a graveyard, effects from spells named Flame Burst count it as a card named Flame Burst.

Morgue Theft

Return target creature card from your graveyard to your hand.
Flashback {4}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Engulfing Flames

Engulfing Flames deals 1 damage to target creature. It can't be regenerated this turn.
Flashback {3}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Chainflinger

{1}{R}, {T}: This creature deals 1 damage to any target.
Threshold — {2}{R}, {T}: This creature deals 2 damage to any target. Activate only if seven or more cards are in your graveyard.

Innocent Blood

Each player sacrifices a creature of their choice.

Morbid Hunger

Morbid Hunger deals 3 damage to any target. You gain 3 life.
Flashback {7}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Liquid Fire

As an additional cost to cast this spell, choose a number between 0 and 5.
Liquid Fire deals X damage to target creature and 5 minus X damage to that creature's controller, where X is the chosen number.

Frightcrawler

Fear (This creature can't be blocked except by artifact creatures and/or black creatures.)
Threshold — As long as seven or more cards are in your graveyard, this creature gets +2/+2 and can't block.

Braids, Cabal Minion

At the beginning of each player's upkeep, that player sacrifices an artifact, creature, or land of their choice.