Horseshoe Crab + Marvin, Murderous Mimic + Wirewood Channeler

GU identity

Commander legal

The 3 combo pieces

• Horseshoe Crab
• Marvin, Murderous Mimic
• Wirewood Channeler

What must be in place

There are at least two Elves on the battlefield.
Marvin does not have summoning sickness.

How to execute it

1. Activate Marvin using Wirewood Channeler's ability by tapping it, adding at least {U}{U}.
2. Activate Marvin using Horseshoe Crab's ability by paying {U}, untapping it.
3. Repeat.

What the combo produces

• Infinite colored mana