Byode, Inverse Sun
Legendary Universewalker — Byode
+2: Mill three cards, then return any number of cards from different Universes milled this way from your graveyard to your hand. -X: Choose a Universe you haven't chosen this way this game. You may cast a spell from that Universe with mana value X or less from your hand without paying its mana cost. Byode, Inverse Sun can be your commander. Your deck can include Universes Beyond cards of any color identity.
Not legal in Commander