Vorthos, Steward of Myth

As Vorthos, Steward of Myth enters, choose a named Magic character. Each spell you cast with the chosen character in its name, flavor text, or art costs {W}{U}{B}{R}{G} less to cast. This effect reduces only the amount of colored mana you pay.

"Just wait, my Madara deck isn't all Emperor Bolas. There's an Umezawa subtheme!"