By using Liquimetal Torque to turn Priest of Titania into an artifact, we lay the groundwork for a clever mechanical loop. Once transformed, our elf can be continuously untapped by paying the activation cost of Voltaic Construct. As long as Priest of Titania taps for at least three green mana—which is easily achieved when there are three or more elves on the battlefield—this setup generates infinite green mana to fuel whatever devastating spells you wish to cast next.