Gatecrash

Aetherize | Instant | | Return all attacking creatures to their owner's hand. | Ryan Barger

Voidwalk | Sorcery | | Exile target creature. Return it to the battlefield under its owner's control at the beginning of the next end step. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.) | James Ryman

Call of the Nightwing | Sorcery | | Create a 1/1 blue and black Horror creature token with flying. Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.) | Adam Paquette