Voltaic Construct + Pyramid of the Pantheon + Ensoul Artifact

Voltaic Construct

Pyramid of the Pantheon

Ensoul Artifact

How it works

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

By bestowing the soul of a massive creature onto an otherwise unassuming monument with Ensoul Artifact, we turn Pyramid of the Pantheon into a legal target for Voltaic Construct's untap ability. Once the pyramid has accumulated its three brick counters, tapping it for three mana comfortably covers the two generic mana required to untap it while leaving a net profit of one mana each cycle. This creates a self-sustaining engine of infinite colored mana and infinite untaps, powered entirely by the synergy between the construct's mechanical precision and the monument's charged potential.