, Exile any number of cards from your graveyard: Target creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

First strike

When this creature enters, you may reveal X black cards in your hand. If you do, target creature gets -X/-X until end of turn.

Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)

Undergrowth — When this creature enters, target creature gains menace and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. (It can't be blocked except by two or more creatures.)

Target creature gets -X/-X until end of turn, where X is the number of cards in your hand.

Specialize

At the beginning of combat on your turn, target creature you control gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

When this creature enters, create a number of 1/1 black Rat creature tokens equal to the number of opponents you have.

, Sacrifice a creature: Target creature gets -2/-2 until end of turn.

Enchant creature

Enchanted creature gets -X/-X, where X is the number of cards in your hand.

, Discard an Elf card: Target creature gets -X/-X until end of turn, where X is the number of Elves you control.

Whenever this creature attacks, it gets +X/+X until end of turn, where X is the number of Clerics on the battlefield.

Whenever you cast an enchantment spell, you may have target creature get -2/-2 until end of turn.

When this creature enters, up to X target creatures each gain intimidate and haste until end of turn, where X is your devotion to black. (A creature with intimidate can't be blocked except by artifact creatures and/or creatures that share a color with it. Each in the mana costs of permanents you control counts toward your devotion to black.)

Target creature gets -X/-X until end of turn, where X is the number of cards in your graveyard.

This creature enters with X +1/+1 counters on it, where X is the number of creature cards in all graveyards.

, Remove a +1/+1 counter from this creature: Target creature gets -1/-1 until end of turn.

Menace

At the beginning of combat on your turn, target creature you control gains menace and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Trample

At the beginning of combat on your turn, target creature you control gains trample and gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard.

Fathomless descent — When this creature enters, target creature an opponent controls gets -X/-X until end of turn, where X is the number of permanent cards in your graveyard.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When this creature is turned face up, target creature gets -3/-3 until end of turn.

When this creature dies, you draw X cards and you lose X life, where X is the number of creature cards in target player's graveyard.