Grinding Station, Lesser Masticore, and Mm'menon, Uthros Exile

Prerequisites

• Grinding Station on the battlefield
• Lesser Masticore on the battlefield
• Mm'menon, Uthros Exile on the battlefield

Steps

1. Activate Grinding Station by tapping it and sacrificing Lesser Masticore
2. When Lesser Masticore dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When Lesser Masticore enters, Grinding Station and Mm'menon trigger
4. Resolve the Grinding Station trigger, untapping it
5. Resolve the Mm'menon trigger, putting a +1/+1 counter on Lesser Masticore
6. Resolve the Grinding Station ability from step 1
7. Repeat

Results

• Infinite artifact ETB
• Infinite artifact LTB
• Infinite artifact sacrifice triggers
• Infinite creature LTB
• Infinite creature ETB
• Infinite creature sacrifice triggers
• Infinite death triggers
• Infinite mill
• Infinite self-mill