Breaching Leviathan

Flash Flying When this creature enters, if you cast it from your hand, exile all attacking creatures.

Flying Lieutenant — As long as you control your commander, this creature gets +2/+2 and creatures you control have vigilance.

Choose an opponent. You and that player each create three 1/1 white Spirit creature tokens with flying. Choose an opponent. You gain 2 life for each creature you control and that player gains 2 life for each creature they control.

Prevent all damage that would be dealt to you and planeswalkers you control this turn by sources you don't control. If damage from a creature source is prevented this way, Comeuppance deals that much damage to that creature. If damage from a noncreature source is prevented this way, Comeuppance deals that much damage to the source's controller.

Flash If a nontoken creature would enter and it wasn't cast, exile it instead.

Create X 1/1 white Soldier creature tokens, where X is the number of creatures on the battlefield.

Destroy all creatures with power greater than target creature's power.

Vigilance When this creature dies, create X 1/1 white Spirit creature tokens with flying, where X is the number of creature cards in your graveyard.