Kormus Bell, Urborg, Tomb of Yawgmoth, and Night of Souls' Betrayal

Prerequisites

• Kormus Bell on the battlefield
• Urborg, Tomb of Yawgmoth on the battlefield
• Night of Souls' Betrayal on the battlefield

Steps

1. When a land enters the battlefield, it becomes a Swamp due to Kormus Bell
2. This then causes it to become a 0/0 creature due to Urborg and Night of Souls' Betrayal, and die as a state-based action due to having 0 toughness

Results

• Destroy all lands
• Destroy all lands that enter the battlefield