Shelob, Child of Ungoliant, Thornbite Staff, and Lavamancer's Skill

Prerequisites

• Shelob, Child of Ungoliant on the battlefield
• Thornbite Staff on the battlefield
• Lavamancer's Skill on the battlefield

Steps

1. Activate the Spider with Thornbite Staff and Lavamancer's Skill attached by tapping it, dealing 1 damage to a creature an opponent controls and destroying it due to the Spider's deathtouch
2. When the creature dies, Shelob and the Spider tapped in step 1 trigger
3. Resolve the Shelob trigger, creating a token copy of the creature that died that is a Food artifact
4. Resolve the Spider trigger, untapping it
5. Repeat as desired
6. You can 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 all creatures opponents control