Horseshoe Crab + Ley Weaver + Marvin, Murderous Mimic

GU identity

Commander legal

The 3 combo pieces

• Horseshoe Crab
• Ley Weaver
• Marvin, Murderous Mimic

How to execute it

1. Activate Marvin using Ley Weaver's ability by tapping it, untapping two lands you control.
2. Activate the two lands by tapping them, adding at least {1}{U}.
3. Activate Marvin using Horseshoe Crab's ability by paying {U}, untapping it.
4. Repeat.

What the combo produces

• Infinite mana lands you control can produce
• Infinite untap of lands you control