Blasting Station, Thran Vigil, and Gravelgill Axeshark

Prerequisites

• Blasting Station on the battlefield
• Thran Vigil on the battlefield
• Gravelgill Axeshark on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Gravelgill Axeshark
2. When Gravelgill Axeshark dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Thran Vigil and Blasting Station trigger
4. Resolve the Thran Vigil trigger, putting a +1/+1 counter on Gravelgill Axeshark
5. Resolve the Blasting Station trigger, untapping it
6. Resolve the Blasting Station ability from step 1
7. Repeat

Results

• Infinite ETB
• Infinite LTB
• Infinite damage
• Infinite death triggers
• Infinite sacrifice triggers
• Infinite mana creatures you control can produce
• Infinite untap of creatures you control