Astral Conjuration

Buyback - Exile two cards from your hand, then return one other card you own from exile to your hand and another to your graveyard.
Create a 1/2, 2/1, 0/3 or 3/0 colorless Nightmare creature token with all creature types and "{0}: This creature gains or loses all creature types and/or colors until end of turn.".
"Some dreams do come true."
- Silex, the Hollow Dreamer