Horobi, Death's Wail, Hex Parasite, and Sangromancer

Prerequisites

• Horobi, Death's Wail on the battlefield
• Hex Parasite on the battlefield
• Sangromancer on the battlefield
• available

Steps

1. Activate Hex Parasite by paying , targeting a creature an opponent controls
2. Horobi triggers, destroying that creature
3. When the creature dies, Sangromancer's first ability triggers, causing you to gain 3 life
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