Renves of the Shared Ideal

Play with the top card of your library revealed.
Any other player may play cards from the top of
your library and may spend mana as though it
were mana of any color to do so.
Whenever another player plays a card you own,
that player draws two cards. Exile the top card
of their library face down. You may look at and
play that card without paying its mana cost for as
long as it remains exiled.