Litharia, Eon Manipulator

+3: Scry X, where X is the number of artifacts you control. Then, reveal the top card of your library. If it's an artifact card, draw a card.
0: Create a 4/4 Legendary Golem Artifact creature token named Tragon, Kadeen's Avenger. It has, {t}: regenerate another target artifact you control.
-15: Return all nonartifact permanents to their owners hands. Then create 10 1/1 contruct artifact creature tokens with indestructible