Salvaging Station, Elven Bow, Ashnod's Altar, and Grinding Station

Prerequisites

• Salvaging Station on the battlefield
• Elven Bow in the graveyard
• Ashnod's Altar on the battlefield
• Grinding Station on the battlefield
• available

Steps

1. Activate Salvaging Station by tapping it, returning Elven Bow from your graveyard to the battlefield
2. When Elven Bow enters, it and Grinding Station trigger
3. Resolve the Grinding Station trigger, untapping it
4. Resolve the Elven Bow trigger, causing you to pay to create a 1/1 Elf Warrior creature token and attach Elven Bow to it
5. Activate Grinding Station by tapping it and sacrificing Elven Bow
6. Activate Ashnod's Altar by sacrificing the Elf Warrior, adding
7. When the Elf Warrior dies, Salvaging Station triggers, untapping Salvaging Station
8. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite mana creatures you control can produce
• Infinite mill
• Infinite sacrifice triggers
• Infinite self-mill
• Infinite untap of creatures you control