Salvaging Station, Elven Bow, Ashnod's Altar, and Umbral Collar Zealot

Prerequisites

• Salvaging Station on the battlefield
• Elven Bow in the graveyard
• Ashnod's Altar on the battlefield
• Umbral Collar Zealot 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 triggers, causing you to pay to create a 1/1 Elf Warrior creature token and attach Elven Bow to it
3. Activate Umbral Collar Zealot by sacrificing Elven Bow
4. Activate Ashnod's Altar by sacrificing the Elf Warrior, adding
5. When the Elf Warrior dies, Salvaging Station triggers, untapping Salvaging Station
6. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite surveil