Crab Umbra + Axebane Guardian
Produces: Infinite colored mana
- Crab Umbra
- Axebane Guardian
- Color identity
- GU
Prerequisites
You control at least four creatures with defender.
Steps
- Activate Axebane Guardian by tapping it, adding at least {U}{U}{U}{U}.
- Activate Crab Umbra by paying {2}{U}, untapping Axebane Guardian.
- Repeat.