Jegantha, the Wellspring

Eminence- At the beginning of the game, if
Jegantha, the Wellspring is in the command zone,
search your library for x times x cards with more
than one color in their cost (Example, {r}{g}) and
exile them, where x is the amount of players.

{t}: Add {w}{u}{b}{r}{g}. This mana cannot be spent
to pay generic mana costs of cards in your hand.

Partner with Jegantha's Shadow, the Source.