Dominaria

Grand Warlord Radha | Legendary Creature | Elf Warrior | Haste Whenever one or more creatures you control attack, add that much mana in any combination of {R} and/or {G}. Until end of turn, you don't lose this mana as steps and phases end. | Anna Steinbauer

Jodah, Archmage Eternal | Legendary Creature | Human Wizard | Flying You may pay {W}{U}{B}{R}{G} rather than pay the mana cost for spells that you cast. | Yongjae Choi