Resonance Reactor

{2}: If the two mana spent to activate this ability are allied colors, add three mana of their mutual enemy color to your mana pool. If the
two mana spent to activate this ability are enemy colors, add three mana of their mutual allied color to your mana pool.
"Align the mana flows so that the troughs of one's waveform meet the crests of the other's, and fire this through two perpendicular half-silvered mirrors, and... well, it just works; we don't really know why."