Ebon Hand Impersonator

Witness (When this creature dies, if it's not a token create Prophecy, a legendary colorless enchantment token with all other abilities of this creature.)
You may have this permanent enter the battlefield as a copy of any permanent on the battlefield that shares a type with it except it gains "Discard two cards: This permanent becomes a copy of any permanent on the battlefield that shares a type with it until end of turn."