Prismar, The Aether Depths

Prismar, The Aether Depths enters the battlefield tapped.
{t}: Add one mana of any color to your mana pool.
{w}{u}{b}{r}{g}, {t}: Reveal the top card of your library. You may cast that card without paying its mana cost. If you do, you lose life equal to that spell's converted mana cost.
The endless Aether. Conduit of life. Origin of all power. Destroyer of the Greedy.