Cavalier of Night, Mirror Image, and Bloodflow Connoisseur

Prerequisites

• Cavalier of Night on the battlefield
• Mirror Image on the battlefield
• Bloodflow Connoisseur on the battlefield

Steps

1. Activate Bloodflow Connoisseur by sacrificing Mirror Image
2. When Mirror Image dies, its last ability from Cavalier of Night triggers, returning itself from your graveyard to the battlefield as a copy of Cavalier of Night
3. When Mirror Image enters the battlefield, its first triggered ability from Cavalier of Night triggers; choose not to sacrifice a creature
4. Resolve the Bloodflow Connoisseur ability from step 1
5. Repeat

Results

• Infinite +1/+1 counters on Bloodflow Connoisseur
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers