Woodfall Primus, Bloodflow Connoisseur, and Hardened Academic

Prerequisites

• Woodfall Primus on the battlefield
• Bloodflow Connoisseur on the battlefield
• Hardened Academic on the battlefield

Steps

1. Activate Bloodflow Connoisseur by sacrificing Woodfall Primus
2. When Woodfall Primus dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it
3. Hardened Academic and Woodfall Primus trigger
4. Resolve the Hardened Academic trigger, putting a +1/+1 counter on Woodfall Primus
5. Resolve the Woodfall Primus trigger, destroying target noncreature permanent
6. Resolve the Bloodflow Connoisseur ability Repeat

Results

• Destroy any number of noncreature permanents
• Infinite +1/+1 counters on a creature
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers
• Lock