Horobi, Death's Wail, Thornbite Staff, and Endbringer

Prerequisites

• Horobi, Death's Wail on the battlefield
• Thornbite Staff on the battlefield
• Endbringer on the battlefield
• Thornbite Staff attached to Endbringer
• Endbringer does not have summoning sickness

Steps

1. Activate Endbringer's first ability by tapping it, targeting any creature
2. Horobi triggers, destroying that creature
3. When the creature dies, Endbringer triggers, untapping itself
4. Repeat
5. You may also repeat this loop whenever a creature enters the battlefield under an opponent's control

Results

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