Spider-Man, Peter Parker, and Triskelion

Prerequisites

• Spider-Man, Peter Parker on the battlefield
• Triskelion on the battlefield

Steps

1. Give Triskelion lifelink
2. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to any target and causing you to gain 1 life
3. Spider-Man triggers, putting a +1/+1 counter on Triskelion
4. Repeat

Results

• Infinite damage
• Infinite lifegain triggers
• Infinite lifegain