Whenever an opponent casts a noncreature spell, that player loses 2 life and you gain 2 life.

Flying

Double team

Whenever this creature or another creature dies, each opponent loses 1 life and you gain 1 life. This ability triggers only once each turn.

Flying, deathtouch

Whenever you gain or lose life during your turn, Bats you control get +1/+0 and gain deathtouch until end of turn. This ability triggers only once each turn.

Constellation — Whenever this creature or another enchantment you control enters, you gain 1 life.

, Pay 1 life: Each opponent loses 1 life.

When this creature enters, if an opponent controls more lands than you, search your library for a Desert card, put it onto the battlefield tapped, then shuffle.

Whenever one or more land cards are put into your graveyard from anywhere, create a 1/1 red, green, and white Sand Warrior creature token. This ability triggers only once each turn.

Whenever one or more tokens you control enter, create a 1/1 black Vampire Rogue creature token with lifelink. This ability triggers only once each turn.

, Sacrifice another creature or artifact: Draw a card.

Other creatures you control get +1/+0.

Whenever another permanent you control leaves the battlefield during your turn, create a 1/1 white Ally creature token. This ability triggers only once each turn.

Whenever a creature you control with power 2 or less attacks, it gains skulk until end of turn. (It can't be blocked by creatures with greater power.)

Whenever a creature with power 4 or greater attacks you, its controller loses 2 life and you gain 2 life.

Whenever one or more Humans and/or Warriors you control enter, conjure a card named Utility Knife onto the battlefield. This ability triggers only once each turn.

: Target creature gains lifelink until end of turn.

: Whenever you gain life this turn, each opponent loses that much life.

Vigilance

Whenever a creature you control becomes the target of a backup ability, copy that ability. You may choose new targets for the copy. This ability triggers only once each turn.

Whenever you sacrifice one or more other creatures, this creature deals 2 damage to each opponent. This ability triggers only once each turn.

Whenever this creature or another creature you control dies, each opponent loses 1 life and you gain 1 life.

Each creature that's enchanted by an Aura you control can't attack you or planeswalkers you control.

At the beginning of your end step, each opponent loses X life and you gain X life, where X is the number of Auras you control.

When this creature enters, look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Whenever one or more artifacts you control enter, put a +1/+1 counter on this creature. This ability triggers only once each turn.

Creature tokens you control get +1/+1.

Whenever one or more nontoken creatures you control die, create a 2/1 white and black Inkling creature token with flying. This ability triggers only once each turn.

Flying

Whenever one or more other creatures you control with power 2 or less enter, draw a card. This ability triggers only once each turn.

Whenever you sacrifice a creature, draw a card. This ability triggers only once each turn.

, , Sacrifice another creature: You gain X life and put X +1/+1 counters on target creature you control, where X is the sacrificed creature's power.