This clever loop turns Quicksilver Elemental into a self-sustaining mana factory by borrowing the exact tools it needs to break the rules of activation. First, Touch of Vitae grants Sanctum Weaver a free, once-per-turn untap ability while giving it haste, but the real magic happens when Quicksilver Elemental uses its own ability to absorb Sanctum Weaver's activated tap ability. Because Quicksilver Elemental's static ability allows you to spend blue mana as though it were any color to pay its activation costs, you can freely filter and repeat the process—tapping the Elemental for a massive influx of mana based on your enchantments, using the zero-cost untap to ready it again, and feeding the loop infinitely.