Earthcraft + Horseshoe Crab + Mesmeric Orb

GU identity

Commander legal

The 3 combo pieces

• Earthcraft
• Horseshoe Crab
• Mesmeric Orb

What must be in place

You control a basic Island.

How to execute it

1. Activate Earthcraft by tapping Horseshoe Crab, untapping the Island.
2. Mesmeric Orb triggers, causing you to mill a card.
3. Activate the Island by tapping it, adding {U}.
4. Activate Horseshoe Crab by paying {U}, untapping Horseshoe Crab.
5. Mesmeric Orb triggers, causing you to mill a card.
6. Repeat.

What the combo produces

• Infinite self-mill