Arcane Endeavor (Extended Art) [Dungeons & Dragons: Adventures in the Forgotten Realms Commander] U-ARC148 and you may spend mana

and you may spend mana as though it were mana of any color to cast spells this way

The Cult of the Dragon leads the charge in an unholy crusade to bring Tiamat back to the Realms

{T}: Put a card exiled with Currency Converter into your graveyard

others follow

Set: EX: Deoxys Type: Psychic Rarity: Ultra Rare Retreat cost: Colorless

Arcane Endeavor (Extended Art) [Dungeons & Dragons: Adventures in the Forgotten Realms Commander] U-ARC148 and you may spend manaSet: Dungeons & Dragons: Adventures in the Forgotten Realms Commander Type: Sorcery Rarity: Rare Cost: {5}{U}{U} Roll two d8 and choose one result. Draw cards equal to that result. Then you may cast an instant or sorcery spell with mana value less than or equal to the other result from your hand without paying its mana cost.