Arixmethes, Slumbering Isle + Marvin, Murderous Mimic + Pili-Pala

GU identity

Commander legal

The 3 combo pieces

• Arixmethes, Slumbering Isle
• Marvin, Murderous Mimic
• Pili-Pala

How to execute it

1. Activate Marvin using Arixmethes's ability by tapping it, adding {G}{U}
2. Activate Marvin using Pili-Pala's ability by paying {2} and untapping it, adding one mana of any color.
3. Repeat.

What the combo produces

• Infinite colored mana