Voltaic Construct + Coveted Jewel + Ensoul Artifact

Voltaic Construct

Coveted Jewel

Ensoul Artifact

How it works

1. Activate Coveted Jewel by tapping it, adding three mana of any color
2. Activate Voltaic Construct by paying 2, untapping Coveted Jewel.
3. Repeat

By enchanting Coveted Jewel with Ensoul Artifact, we transform the mana rock into a 5/5 artifact creature capable of tapping for three mana while bypassing its usual drawback of changing control when unblocked. This allows us to tap the newly animated Jewel for a massive mana influx, using two of that mana to fuel Voltaic Construct's ability to untap it. Because Voltaic Construct targets any artifact creature, this creates a closed loop that generates infinite colored mana and an arbitrarily large number of untaps.