Cavalier of Night, Activated Sleeper, and Goblin Bombardment

Prerequisites

• Cavalier of Night on the battlefield
• Activated Sleeper in the graveyard
• Goblin Bombardment on the battlefield

Steps

1. Activate Goblin Bombardment by 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, it triggers; choose not to sacrifice a creature
4. Activate Goblin Bombardment by sacrificing Activated Sleeper
5. When Activated Sleeper dies, it triggers, returning Activated Sleeper from your graveyard to the battlefield as a copy of Cavalier of Night
6. When Activated Sleeper enters the battlefield, it triggers; choose not to sacrifice a creature
7. Resolve the Goblin Bombardment ability from step 4, dealing 1 damage to any target
8. Repeat from step 4

Results

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