Essence of Orthodoxy, Grinding Station, Summoning Station, and Xenograft

Prerequisites

• Essence of Orthodoxy on the battlefield
• Grinding Station on the battlefield
• Summoning Station on the battlefield
• Xenograft on the battlefield
• "Phyrexian" chosen with Xenograft

Steps

1. Activate Summoning Station by tapping it, creating a 2/2 Pincher creature token
2. When the Pincher enters the battlefield as a Phyrexian due to Xenograft, Essence of Orthodoxy triggers, creating an Incubator artifact token
3. When the Incubator enters the battlefield, Grinding Station triggers, untapping itself
4. Activate Grinding Station by tapping it and sacrificing the Incubator
5. Summoning Station triggers, untapping itself
6. Resolve the Grinding Station ability, causing target player to mill three cards
7. Repeat

Results

• Infinite creature tokens
• Infinite ETB
• Infinite mill
• Infinite self-mill