Crab Umbra + Harabaz Druid
GU identity
Commander legal
The 2 combo pieces
What must be in place
You control at least four Allies.
How to execute it
- Activate Harabaz Druid by tapping it, adding at least {U}{U}{U}{U}.
- Activate Crab Umbra by paying {2}{U}, untapping Harabaz Druid.
- Repeat.
What the combo produces
- Infinite colored mana