Benthic Biomancer + The Wise Mothman + Shambling Shell

Prerequisites

• You have a way to draw a card.

Steps

1. 1Attempt to draw card, instead choosing to mill 3 cards and return Shambling Shell from your graveyard to your hand.
2. 2If you milled a nonland card, The Wise Mothman triggers, putting a +1/+1 counter on Benthic Biomancer.
3. 3Benthic Biomancer triggers, causing you to draw a card and discard Shambling Shell.
4. 4Repeat.

Effects

• Infinite self-mill