Stormwing, God of skies

+1: Create a 2/2 red Dragon creature token with flying. It has "{r}: This creature gets +1/+0 until end of turn."
-X: Search your library for a Dragon creature card with converted manna cost X, put it onto the battlefield, then shuffle.
-10: All creatures on the batlefield become 5/5 red dragons with flying. Tap all creatures your opponents control.