Soul of Windgrace, Surly Badgersaur, Dakmor Salvage, and Agatha of the Vile Cauldron

Prerequisites

• Soul of Windgrace on the battlefield
• Surly Badgersaur on the battlefield
• Dakmor Salvage in hand
• Agatha of the Vile Cauldron on the battlefield
• available

Steps

1. Activate Soul of Windgrace's second ability by paying and discarding Dakmor Salvage
2. Surly Badgersaur's second ability triggers, creating a Treasure token
3. Resolve the Soul of Windgrace ability, causing you to mill two cards and return Dakmor Salvage from your graveyard to your hand
4. Activate a Treasure token by tapping and sacrificing it, adding
5. Repeat

Results

• Infinite self-discard triggers
• Infinite self-mill