Sepulchral Primordial, Infinite Reflection, and Blasting Station

Prerequisites

• Sepulchral Primordial on the battlefield
• Infinite Reflection on the battlefield
• Blasting Station on the battlefield

Steps

1. Cause a nontoken creature to enter the battlefield under your control, which enters as a copy of Sepulchral Primordial due to Infinite Reflection
2. When the creature enters, it and Blasting Station trigger
3. Resolve the Blasting Station trigger, untapping it
4. Holding priority, activate Blasting Station by tapping it and sacrificing the creature
5. Resolve the creature's trigger, putting a creature card from an opponent's graveyard onto the battlefield under your control as a copy of Sepulchral Primordial
6. Repeat from step 2

Results

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