Voltaic Construct + Neurok Transmuter + Gumato

Voltaic Construct

Neurok Transmuter

Gumato

How it works

1. Cause Gumato to become an artifact using Neurok Transmuter.
2. Activate Gumato by tapping it, adding
3. Activate Voltaic Construct by paying 2, untapping Gumato.
4. Repeat from step 2.

This charming loop transforms Gumato into an artifact creature with the help of Neurok Transmuter, allowing it to tap for a massive influx of green mana using its own ability. Once the creature is an artifact, Voltaic Construct can step in to repeatedly untap it for the low cost of two mana. Because Gumato yields three green mana each cycle while the Construct demands only two, you are left with an infinite surplus of green mana and fully untapped artifact creatures ready to dominate the board.