Xrathiks, Shadows Scion

+1: Draw a card. If it's type is dragon that card
remains in your hand. If not, exile that card
face down. (You may look at it at any time.)
-3: Once per turn, Xrathiks may cast, Scionscape
(Spread out all exiled cards face down. opponents
choose 3 at random. They exist in the command
zone. You may play them for {3} each, as instants.
Exile them after that card resolves or is destroyed.)
-10: Unleash, ( Exile all opponents nonland permanents.
Each becomes a 2/2 shadow dragon toke