To pull off this magical engine, you first need Myr Welder to acquire the activated abilities of Sceptre of Eternal Glory by exiling it, which transforms the welder into a powerhouse mana source capable of tapping for three mana of any color. To make this loop self-sustaining, Pemmin's Aura is enchanted onto Myr Welder so that its untap ability can be activated using just a fraction of the mana generated by the Sceptre's power. By repeatedly tapping the welder for a surplus of mana and spending a blue mana to untap it with the Aura, you effortlessly generate infinite colored mana to fuel the rest of your spells.