Accomplished Alchemist + Crab Umbra

GU identity

Commander legal

The 2 combo pieces

• Accomplished Alchemist
• Crab Umbra

What must be in place

You have gained at least 4 life this turn.

How to execute it

1. Activate Accomplished Alchemist by tapping it, adding at least {U}{U}{U}{U}.
2. Activate Crab Umbra by paying {2}{U}, untapping Accomplished Alchemist.
3. Repeat.

What the combo produces

• Infinite colored mana