Omniscience Enter the Infinite

Draw two cards, then discard two cards. Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Return target permanent card from your graveyard to the battlefield.

Lands you control have ": Add one mana of any color." : Add one mana of any color.

Draw cards equal to the number of cards in your library, then put a card from your hand on top of your library. You have no maximum hand size until your next turn.

You may cast spells from your hand without paying their mana costs.