Amrou Kithkin

Amrou Kithkin can't be blocked by creatures with power 3 or greater.

Act of Authority

When Act of Authority enters, you may exile target artifact or enchantment.
At the beginning of your upkeep, you may exile target artifact or enchantment. If you do, its controller gains control of Act of Authority.

Aggression

Enchant non-Wall creature
Enchanted creature has first strike and trample.
At the beginning of the end step of enchanted creature's controller, destroy that creature if it didn't attack this turn.

Angelic Chorus

Whenever a creature you control enters, you gain life equal to its toughness.

Basandra, Battle Seraph

Flying
Players can't cast spells during combat.
{R}: Target creature attacks this turn if able.

Absolute Grace

All creatures have protection from black.

Aether Flash

Whenever a creature enters, Aether Flash deals 2 damage to it.