Destroy target creature with reminder text. (Reminder text is any italicized text in parentheses that explains rules you already know.)

Target creature gets +2/+0 until end of turn. Regenerate it. You lose 2 life.

Target creature you control gets +1/+0 and gains deathtouch until end of turn. Whenever a creature dealt damage by that creature dies this turn, its controller loses 2 life. (Any amount of damage a creature with deathtouch deals to a creature is enough to destroy it.)

Prevent all combat damage that would be dealt this turn.

This spell can't be countered. (This includes by the ward ability.)

Target creature gets -X/-X until end of turn.

Target creature gets -1/-1 until end of turn. If it's a Cyclops, destroy it.

Destroy target legendary creature.

Separate all creatures target player controls into two piles. Destroy all creatures in the pile of that player's choice. They can't be regenerated.

Target creature gets -3/-0 until end of turn. Then if that creature's power is 0 or less, destroy it.

Destroy target nonlegendary creature.

Destroy target creature with mana value X.

Cast this spell only if you control a creature.

Destroy target creature. That creature's controller may create an Arrest token attached to a creature you control. (It's a copy of the card Arrest)

You gain life equal to the damage dealt to you this turn. Simulacrum deals damage to target creature you control equal to the damage dealt to you this turn.

Destroy target creature if it has mana value 2 or less.

Revolt — Destroy that creature if it has mana value 4 or less instead if a permanent left the battlefield under your control this turn.

Up to one target creature gets -1/-1 until end of turn. You create a 1/1 black Rat creature token with "This token can't block."

Put a -1/-1 counter on target creature. When that creature dies this turn, its controller gets a poison counter.

Destroy target creature with power X or less.

Enchant creature

Enchanted creature gets +3/+3.

When enchanted creature becomes the target of a spell or ability, destroy that creature. It can't be regenerated.