Commander\'s Field

Commander’s Field enters the battlefield tapped. {T}: add {C}. {t}: Choose a color that a land you control could produce. Add one mana of that color. {t}, Sacrifice Commander’s Field: Add four mana of any color in any combination, including {C}. This mana doesn’t empty from your mana pool until end of turn. {flavor} “With unity among all, limitless potential emerges.” —The First Convocation