Loki - Lord of Yggdrasil

Changeling, Reach

Lord of Reality - Whenever a instant or sorcery card is played, if it wasn't a copy, create a copy of the spell, if it isn't a color you can play, it becomes a color you can play.

{g}{u}{w}: Sacrifice ten different spells you have copied to search for Mjolnir - Thor's legacy, or The Casket of Ancient Winters