Sorceress Queen, Elesh Norn, Grand Cenobite, and Thornbite Staff

Prerequisites

• Sorceress Queen on the battlefield
• Elesh Norn, Grand Cenobite on the battlefield
• Thornbite Staff on the battlefield
• Thornbite Staff attached to Sorceress Queen
• Sorceress Queen does not have summoning sickness

Steps

1. Activate Sorceress Queen by tapping it, causing a creature an opponent controls to have base power and toughness 0/2 until end of turn
2. The creature dies as a state-based action due to having zero toughness because of Elesh Norn's static effect, triggering Sorceress Queen, untapping Sorceress Queen
3. Repeat as desired
4. You may also repeat this loop whenever a creature enters the battlefield under an opponent's control

Results

• Destroy all creatures opponents control
• Destroy all creatures that enter the battlefield under an opponent's control