Thran Vigil, Benthic Biomancer, and Shambling Shell

Prerequisites

• Thran Vigil on the battlefield
• Benthic Biomancer on the battlefield
• Shambling Shell in hand
• undefined

Steps

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

Results

• Infinite self-mill