Cass, Hand of Vengeance, Griffin Guide, and Blasting Station

Prerequisites

• Cass, Hand of Vengeance on the battlefield
• Griffin Guide on the battlefield
• Blasting Station on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing the creature with Griffin Guide attached
2. When the creature dies, Cass and Griffin Guide trigger
3. Resolve the Griffin Guide trigger, creating a 2/2 Griffin creature token
4. When the Griffin enters the battlefield, Blasting Station triggers, untapping Blasting Station
5. Resolve the Cass trigger, returning Griffin Guide from your graveyard to the battlefield attached to another creature you control
6. Resolve the Blasting Station ability from step 1
7. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite sacrifice triggers
• Infinite death triggers
• Infinite damage