Faeburrow Elder + Marvin, Murderous Mimic + Simic Ragworm

GWU identity

Commander legal

The 3 combo pieces

• Faeburrow Elder
• Marvin, Murderous Mimic
• Simic Ragworm

How to execute it

1. Activate Marvin using Faeburrow Elder's ability by tapping it, adding at least {G}{W}{U}.
2. Activate Marvin using Simic Ragworm's ability by paying {U}, untapping it.
3. Repeat.

What the combo produces

• Infinite black mana if you control a black permanent
• Infinite green mana
• Infinite non-blue mana of colors among permanents you control
• Infinite red mana if you control a red permanent
• Infinite white mana