Face-down creature spells you cast costless to cast.
: Turn Obscuring Aether face down. (It becomes a 2/2 creature.)
2/25/2015 Obscuring Aether has no effect on spells that instruct you to manifest cards.
2/25/2015 Note that Obscuring Aether doesn’t have a morph cost. Once it’s turned face down, it doesn’t have a way to turn itself face up.