Stalwart Successor, Woodfall Primus, and Yahenni, Undying Partisan

Prerequisites

• Stalwart Successor on the battlefield
• Woodfall Primus on the battlefield
• Yahenni, Undying Partisan on the battlefield

Steps

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

Results

• Destroy any number of noncreature permanents
• Lock
• Infinite ETB
• Infinite LTB
• Infinite death triggers
• Infinite sacrifice triggers