This fascinating loop turns Myr Welder into a self-sustaining mana and untap engine once White Lotus Tile is safely tucked away in the graveyard as fuel for its imprint ability. High Alert pulls double duty here: not only does its static ability grant your creatures the knack to attack despite having defender, but its activated ability provides the precise untap lever needed to refresh our Myr Welder. By feeding the mana generated through White Lotus Tile back into High Alert's untap cost, you generate infinite colored mana and endless untaps of your own creatures.