Wildheart Alchemist

When Wildheart Alechemist enters the battlefield
or changes color exile the top two cards of your library.
As long as Wildheart Alchemist is red you may
cast instant and sorceries you own exiled with it.
Tint {2}{g} (This permanent becomes green)
As long as Wildheart Alchemist is green you may
cast creature cards you own exiled with it.