Melira, Sylvok Outcast, Blasting Station, and Gravelgill Axeshark

Prerequisites

• Melira, Sylvok Outcast on the battlefield
• Blasting Station 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 without a -1/-1 counter on it due to Melira
3. When Gravelgill Axeshark enters, Blasting Station triggers, untapping Blasting Station Resolve the Blasting Station ability from step 1 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