By outfitting Wirewood Channeler with Silverskin Armor, we successfully transform the Elf druid into an artifact creature, which is the crucial pivot that makes everything else possible. With that type change in place, tapping Wirewood Channeler for a surplus of mana easily funds the ability of Voltaic Construct to untap it. Because the mana produced exceeds the two generic mana required to activate Voltaic Construct, this self-sustaining loop spins indefinitely to generate infinite colored mana and infinite untaps of your artifact creatures.