Voltaic Construct + Encroaching Mycosynth + Gumato

Voltaic Construct

Encroaching Mycosynth

Gumato

How it works

1. Activate Gumato by tapping it, adding
2. Activate Voltaic Construct by paying 2, untapping Gumato.
3. Repeat

This combo relies on Encroaching Mycosynth to fundamentally rewrite the battlefield, turning your creatures into artifacts alongside their usual types. Because of this blanket transformation, Gumato is no longer just a standard creature; it becomes an artifact creature that can tap for three green mana while retaining its vigilance. You then channel that green harvest into Voltaic Construct's ability, paying two mana to untap Gumato so it can immediately tap for a net profit of one green mana. Cycling this activation loop infinitely yields as much green mana as you desire, all while keeping Voltaic Construct and Gumato continuously untapping.