Mnemonic Betrayal [Guilds of Ravnica] Innistrad put all cards exiled with

put all cards exiled with Gustha's Scepter into their owner's graveyard

From the holy church to the sacred glade

Set: Zendikar Type: Legendary Creature — Vampire Warrior Rarity: Mythic Cost: {5}{B}{B} {B}{B}{B}

you might as well trade it for something else

Whenever Infernal Medusa becomes blocked by a non-Wall creature

Mnemonic Betrayal [Guilds of Ravnica] Innistrad put all cards exiled withSet: Guilds of Ravnica Type: Sorcery Rarity: Mythic Cost: {1}{U}{B} Exile all opponents' graveyards. You may cast spells from among those cards this turn, and you may spend mana as though it were mana of any type to cast those spells. At the beginning of the next end step, if any of those cards remain exiled, return them to their owners' graveyards. Exile Mnemonic Betrayal.