Skittering Precursor, Sword of the Meek, Ruination Guide, and Grinding Station

Prerequisites

• Skittering Precursor on the battlefield
• Sword of the Meek on the battlefield
• Ruination Guide on the battlefield
• Grinding Station on the battlefield

Steps

1. Activate Grinding Station by tapping it and sacrificing Sword of the Meek
2. Skittering Precursor triggers, creating a 0/1 Eldrazi Spawn creature token
3. When the Eldrazi Spawn enters the battlefield as a 1/1 due to Ruination Guide, Sword of the Meek triggers, returning Sword of the Meek from your graveyard to the battlefield attached to the Eldrazi Spawn
4. When Sword of the Meek enters the battlefield, Grinding Station triggers, untapping Grinding Station
5. Resolve the Grinding Station ability from step 1, causing target player to mill three cards
6. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill
• Infinite colorless mana
• Infinite creature tokens