Loki, God of Mischief

+1: Put a mischief counter on target creature or planeswalker. Loki, God of Mischief phases out.
-3: Loki, God of Mischief becomes a copy of target creature until end of turn. It gains haste and indestructible until end of turn.
-5: For each permanent with a mischief counter on it, create a token that is a copy of it.