Marvin, Murderous Mimic + Pili-Pala + Fanatic of Rhonas

Marvin, Murderous Mimic

Pili-Pala

Fanatic of Rhonas

How it works

1. Activate Marvin using Fanatic of Rhonas's ability by tapping it, adding .
2. Activate Marvin using Pili-Pala's ability by paying 2 and untapping it, adding one mana of any color.
3. Repeat.

By combining Marvin, Murderous Mimic with Pili-Pala and Fanatic of Rhonas, Marvin inherits the best parts of both creatures to set up a mana-generating engine. Once Marvin gains Pili-Pala's untap ability and Fanatic of Rhonas's tap ability, you can tap Marvin for green mana, use a portion of that mana to pay Pili-Pala's cost to untap Marvin, and repeat the process to generate infinite colored mana.