Temple to Vadeus

Temple to Vadeus enters the battlefield
tapped.
{t}: Add {b} or {r} to your mana pool.
{b}{b}{r}{r}, {t}: Until end of turn, Temple to
Vadeus gains "Whenever you discard one or
more cards, you may exile the top card of your
library. You may play that card until the end of
your next turn."
There is no cost too great to pay.