Ashcoat of the Shadow Swarm, Mind Over Matter, and The Peregrine Dynamo

Prerequisites

• Ashcoat of the Shadow Swarm on the battlefield
• Mind Over Matter on the battlefield
• The Peregrine Dynamo on the battlefield
• Two Rat creature cards in hand and/or graveyard
• available

Steps

1. At the beginning of your end step, Ashcoat of the Shadow Swarm triggers
2. In response, activate The Peregrine Dynamo by paying and tapping it, copying Ashcoat of the Shadow Swarm's triggered ability
3. Resolve the copied ability, milling four cards and returning up to two Rat creature cards from your graveyard to your hand
4. Activate Mind Over Matter twice by discarding two Rat creature cards, untapping a land and The Peregrine Dynamo
5. Activate that land by tapping it to add
6. Repeat from step 2

Results

• Infinite self-discard triggers
• Infinite self-mill