Whenever you cast a noncreature spell, Accident-Prone Apprentice perpetually gets +1/+1. This ability also triggers if Accident-Prone Apprentice is in exile.
Flying Whenever you cast a creature spell without flying, conjure a duplicate of it into your hand. The duplicate perpetually gains flying. This ability triggers only once each turn.
When Acererak the Archlich enters, if you haven't completed Tomb of Annihilation, return Acererak the Archlich to its owner's hand and venture into the dungeon. Whenever Acererak the Archlich attacks, create a number of 2/2 black Zombie creature tokens equal to the number of opponents you have.
{4}, {T}: Whenever target creature deals combat damage to a non-Wall creature this turn, destroy that non-Wall creature. When the targeted creature leaves the battlefield this turn, sacrifice Acidic Dagger. Activate only before blockers are declared.
Prevent the next X damage that would be dealt to target creature this turn, where X is your devotion to white. If damage is prevented this way, Acolyte's Reward deals that much damage to any target.
When Acquisitions Expert enters, target opponent reveals a number of cards from their hand equal to the number of creatures in your party. You choose one of those cards. That player discards that card.
Survival — At the beginning of your second main phase, if Acrobatic Cheerleader is tapped, put a flying counter on it. This ability triggers only once.
"I used to cheat death every day in practice. This is nothing."
Nontoken creatures you control which aren't from the MOM main set get +1/+0 and gain haste. (This includes Multiverse Legends, playtest cards, cards from Mystery Booster, and anything else not from the MOM main set.)
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.