Arbor Adherent + Crab Umbra

GU identity

Commander legal

The 2 combo pieces

• Arbor Adherent
• Crab Umbra

What must be in place

You control a creature with toughness 4 or greater.

How to execute it

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

What the combo produces

• Infinite colored mana