Ethereal Megaloft

Flying, shroud
Aetherize 5 (When this creature dies, add five mana of any one of the colors printed on this card to your mana pool. Mana added this way does not empty from your mana pool as steps and phases end.)
Evoke {u/b}{u/r}{w/u}{g/u} (You may cast this spell for its evoke cost. If you do, it's sacrficed when it comes into play.)