How it fits into the theme of big mana, big creatures is debatable
Mana costs can include specific colors of Mana, or generic Mana, which can be Mana of any color
While there are actually 29 Instant and Sorceries in my build, of them don't have any colourless mana that can be discounted
He adds, "A lot of Magic's growth has been through collectability, through things like we've done with collector boosters and Secret Lair, as well as more socially oriented play like we've seen with Commander, which is now the most popular format of play in Magic." Right now, none of that transfers well to Arena, but this is something the CEO hopes to rectify, "in new digital iterations of Magic, both on Arena and outside of Arena"
Prophetic Prism, first printed in Rise of the Eldrazi was last seen in Commander
Convoke can also pay for colored mana