Elemental Resonance

Oracle Text

Enchant permanent

At the beginning of your precombat main phase, add mana equal to enchanted permanent's mana cost. (Mana cost includes color. If a mana symbol has multiple colors, choose one.)

Card Rulings

5/1/2006 If the enchanted permanent’s mana cost is , this Aura’s controller adds to their mana pool. If its mana cost is , this Aura’s controller adds to their mana pool. If its mana cost is (W/U)(W/U), this Aura’s controller chooses whether to add , , or to their mana pool. The choice may be different each time the ability resolves.
5/1/2006 This ability isn’t a mana ability. It uses the stack.
5/1/2006 Only the first main phase in a turn is the “precombat main phase,” even if additional main phases are generated by some effect.
10/1/2009 You get the mana whether you want it or not. If you don’t spend it, it will disappear at the end of the current step (or phase).