Angelic Gift

Enchant creature
When this Aura enters, draw a card.
Enchanted creature has flying.

Audacious Infiltrator

This creature can't be blocked by artifact creatures.

Assault Griffin

Angel of Mercy

Flying
When this creature enters, you gain 3 life.

Attentive Skywarden

Flying
Whenever this creature deals combat damage to a player or battle, transform up to one target Incubator token you control.

Azorius Arrester

When this creature enters, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

Baffling End

When this enchantment enters, exile target creature an opponent controls with mana value 3 or less.
When this enchantment leaves the battlefield, target opponent creates a 3/3 green Dinosaur creature token with trample.

Aven of Enduring Hope

Aunt May

Whenever another creature you control enters, you gain 1 life. If it's a Spider, put a +1/+1 counter on it.

Airbending Lesson

Airbend target nonland permanent. (Exile it. While it's exiled, its owner may cast it for {2} rather than its mana cost.)
Draw a card.

Angelheart Protector

When this creature enters, target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)