Underworld Breach, Culling the Weak, and Stitcher's Supplier

Prerequisites

• Underworld Breach on the battlefield
• Culling the Weak in the graveyard
• Stitcher's Supplier on the battlefield
• You have at least three additional cards in your graveyard
• available

Steps

1. Cast Culling the Weak for its escape cost by paying , exling three other cards from your graveyard, and sacrificing Stiticher's Supplier
2. Stitcher's Supplier dies, causing you to mill three cards
3. Resolve Culling the Weak, adding
4. Cast Stitcher's Supplier for its escape cost by paying and exling three other cards from your graveyard
5. Stitcher's Supplier enters the battlefield, causing you to mill three cards
6. Repeat

Results

• Infinite self-mill