Shriekmaw

Flying 1GU: Creatures you control gain shroud until end of turn. (They can't be the targets of spells or abilities.)

Destroy all artifacts, creatures, and enchantments. Cycling 3 (3, Discard this card: Draw a card.)

Flying When this creature enters, exile target player's graveyard.

Flying Each opponent who cast a spell this turn can't attack with creatures. Each opponent who attacked with a creature this turn can't cast spells.

Flying As this creature enters, each player chooses war or peace. Creatures controlled by players who chose war get +3/+0. Creatures controlled by players who chose peace get +0/+3.

Radiance — Choose a color. Target creature and each other creature that shares a color with it gain protection from the chosen color until end of turn.

Target player gains 2 life for each creature on the battlefield.

Enchant player Whenever a creature attacks enchanted player, its controller gains 1 life.