Visara the Dreadful, and Thornbite Staff

Prerequisites

• Visara the Dreadful on the battlefield
• Thornbite Staff on the battlefield
• Thornbite Staff attached to Visara
• Visara does not have summoning sickness

Steps

1. Activate Visara by tapping it, destroying any creature
2. The creature dies, triggering Visara, untapping Visara
3. Repeat
4. You may also repeat this loop any time a creature enters the battlefield under an opponent control

Results

• Destroy any creature that enters the battlefield under an opponent's control
• Destroy any number of target creature(s)