Cavalier of Night, Activated Sleeper, and Blasting Station

Prerequisites

• Cavalier of Night on the battlefield
• Activated Sleeper in the graveyard
• Blasting Station on the battlefield

Steps

1. Activate Blasting Station by tapping it and sacrificing Cavalier of Night
2. When Cavalier of Night dies, it triggers, returning Activated Sleeper from your graveyard to the battlefield as a copy of Cavalier of Night
3. When Activated Sleeper enters the battlefield, its first triggered ability from Cavalier of Night triggers and Blasting Station triggers
4. Resolve Activated Sleeper's ability, choosing not to sacrifice a creature
5. Resolve the Blasting Station ability from step 3, untapping it
6. Resolve the Blasting Station ability from step 1, dealing 1 damage to any target
7. Activate Blasting Station by tapping it and sacrificing Activated Sleeper
8. When Activated Sleeper dies, its last ability from Cavalier of Night triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night
9. When Activated Sleeper enters the battlefield, it triggers and Blasting Station triggers
10. Resolve Activated Sleeper's ability, choosing not to sacrifice a creature
11. Resolve the Blasting Station ability from step 9, untapping it
12. Resolve the Blasting Station ability from step 7, dealing 1 damage to any target
13. Repeat from step 5

Results

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