Tragic Slip

Target creature gets -1/-1 until end of turn.
Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Spontaneous Mutation

Flash
Enchant creature
Enchanted creature gets -X/-0, where X is the number of cards in your graveyard.

Tragic Slip

Target creature gets -1/-1 until end of turn.
Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Butcher Ghoul

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner’s control with a +1/+1 counter on it.)

Butcher Ghoul

Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner’s control with a +1/+1 counter on it.)

Supernatural Stamina

Until end of turn, target creature gets +2/+0 and gains “When this creature dies, return it to the battlefield tapped under its owner’s control.”

Moment of Heroism

Target creature gets +2/+2 and gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Tragic Slip

Target creature gets -1/-1 until end of turn.
Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Reclamation Sage

When this creature enters, you may destroy target artifact or enchantment.

Fireshrieker

Equipped creature has double strike. (It deals both first-strike and regular combat damage.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Kruin Striker

Whenever another creature you control enters, Kruin Striker gets +1/+0 and gains trample until end of turn. (It can deal excess combat damage to the player or planeswalker it’s attacking.)

Pestermite

Flash
Flying
When Pestermite enters, you may tap or untap target permanent.

Fireshrieker

Equipped creature has double strike. (It deals both first-strike and regular combat damage.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Crawling Sensation

At the beginning of your upkeep, you may mill two cards. (You may put the top two cards of your library into your graveyard.)
Whenever one or more land cards are put into your graveyard from anywhere for the first time each turn, create a 1/1 green Insect creature token.

Patagia Viper

Flying
When Patagia Viper enters, create two 1/1 green and blue Snake creature tokens.
When Patagia Viper enters, sacrifice it unless was spent to cast it.

Seal of Fire

Sacrifice Seal of Fire: It deals 2 damage to any target.

Boldwyr Intimidator

Cowards can’t block Warriors.
: Target creature becomes a Coward until end of turn.
: Target creature becomes a Warrior until end of turn.

Aven Fisher

Flying (This creature can’t be blocked except by creatures with flying or reach.)
When Aven Fisher dies, you may draw a card.

Seal of Removal

Sacrifice Seal of Removal: Return target creature to its owner’s hand.

Ramosian Rally

If you control a Plains, you may tap an untapped creature you control rather than pay this spell’s mana cost.
Creatures you control get +1/+1 until end of turn.

Shelter

Target creature you control gains protection from the color of your choice until end of turn.
Draw a card.