Vraska, Swarm's Eminence, and Triskelion

Prerequisites

• Vraska, Swarm's Eminence on the battlefield
• Triskelion on the battlefield
• Triskelion has at least two +1/+1 counters
• You have a way to give Triskelion deathtouch

Steps

1. Give Triskelion deathtouch
2. Activate Triskelion by removing a +1/+1 counter from it, dealing 1 damage to an opponent
3. Vraska triggers, putting a +1/+1 counter on Triskelion
4. Repeat from step 2

Results

• Infinite damage