Enzicord, Destroyer of Dreams

Hexproof, deathtouch
When Enzicord, Destroyer of Dreams enters the battlefield, you gain 5 life, each opponent loses 5 life, and you draw three cards.
At the beginning of your upkeep, each player puts the top three cards of their library into their graveyard. You may choose one of those cards and exile it. As long as that card remains exiled, you may cast it and you may spend mana as though it were mana of any color to cast it.