Shay & Milo, DM Companions

Companion - No card in your deck has more than one of the same mana symbol in its mana cost. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.)

{t}: Add {w}{u}{b}{r}{g}. This mana can't be
spent to pay generic mana costs.

A DM is only as great as the companions who inspire them.