Voltaic Construct + Sydri, Galvanic Genius + The Eternity Elevator

Voltaic Construct

Sydri, Galvanic Genius

The Eternity Elevator

How it works

1. Animate The Eternity Elevator using Sydri.
2. Activate The Eternity Elevator by tapping it, adding CCC.
3. Activate Voltaic Construct by paying 2, untapping The Eternity Elevator.
4. Repeat from step 2.

Sydri, Galvanic Genius does the foundational work here, turning The Eternity Elevator into an artifact creature so it can tap for mana while remaining fully susceptible to manipulation. Once animated, tapping The Eternity Elevator yields three colorless mana, more than enough to fund Voltaic Construct's ability to untap it. Because Voltaic Construct's untap targets any artifact creature—and The Eternity Elevator's massive activated abilities scale with its charge counters or simply provide a net-positive mana loop—this engine can endlessly cycle between tapping and untapping to generate infinite colorless and colored mana.