Benthic Biomancer + Stinkweed Imp + Thran Vigil

UB identity

Commander legal

The 3 combo pieces

• Benthic Biomancer
• Stinkweed Imp
• Thran Vigil

How to execute it

1. Put a +1/+1 counter on Benthic Biomancer.
2. Benthic Biomancer triggers, causing you to mill five cards and return Stinkweed Imp from your graveyard to your hand, and then causing you to discard Stinkweed Imp.
3. Thran Vigil triggers, putting a +1/+1 counter on Benthic Biomancer.
4. Repeat from step 2.

What the combo produces

• Infinite self-mill