Darth Sidious, Dark Lord

At the beginning of your upkeep, each opponent exiles the top card of his or her library. You may play those cards for as long as they remain exiled, and you may spend mana as though it were mana
of any color to cast them.
Sacrifice another Sith creature: Add X mana in any combination of {u}, {b} and/or {r}, where X is the sacrificed creature's mana value.
"Power! Unlimited Power!"