Elemental Resonance | Magic: The Gathering
Formats Elemental Resonance is Legal in
Official Oracle Text for Elemental Resonance
At the beginning of your precombat main phase, add mana equal to enchanted permanent's mana cost to your mana pool. (Mana cost includes color. If a mana symbol has multiple colors, choose one.)
Official Rulings for Elemental Resonance
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).