Xalxys, Merfolk Polymorph

+2: Exile target card from your graveyard. Creatures exiled this way lose all types and become colorless Shapeshifters with changeling.
-3: Put a token that's a copy of target card exiled with Xalxys, Merfolk Polymorph onto the battlefield.
-10: You get an emblem with "At the beginning of your upkeep put a token that's a copy of target shapeshifter onto the battlefield."