Voltaic Construct + Nyx Lotus + March of the Machines

Voltaic Construct

Nyx Lotus

March of the Machines

How it works

1. Activate Nyx Lotus by tapping it, adding at least 3
2. Activate Voltaic Construct by paying 2, untapping Nyx Lotus.
3. Repeat

With March of the Machines turning all of your noncreature artifacts into artifact creatures, Nyx Lotus is transformed into a creature whose mana value naturally matches its devotion-boosting potential. Because this turns the Lotus into an eligible target for Voltaic Construct, you can pump two of the mana generated by the Lotus back into the Construct's ability to untap it. As long as your devotion to the chosen color is three or greater, this loop completely pays for itself and yields as much colored mana and as many untaps of your artifact creatures as you desire.