Blasting Station, and Railway Brawler

Prerequisites

• Blasting Station on the battlefield
• Railway Brawler on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing the persist creature
2. When the persist creature dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. When the persist creature enters, Blasting Station and Railway Brawler trigger
4. Resolve the Railway Brawler trigger, putting a number of +1/+1 counters on the persist creature
5. Resolve the Blasting Station trigger, untapping it
6. Resolve the Blasting Station ability from step 1
7. Repeat

Results

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