Sokka and Suki, Sokka, Swordmaster, Razor Boomerang, and Frostcliff Siege

Prerequisites

• Sokka and Suki on the battlefield
• Sokka, Swordmaster on the battlefield
• Razor Boomerang in hand
• Frostcliff Siege on the battlefield

Steps

1. Cast Razor Boomerang by paying due to Sokka, Swordmaster
2. When Razor Boomerang enters, Sokka and Suki's second ability triggers, creating a 1/1 Ally creature token
3. When the Ally enters, Sokka and Suki's first ability triggers, attaching Razor Boomerang to the Ally token
4. Activate the Ally token by tapping it and unattaching Razor Boomerang, dealing 1 damage to any target and returning Razor Boomerang from the battlefield to your hand
5. Repeat

Results

• Infinite ETB
• Infinite damage
• Infinite storm count
• Infinite tapped creature tokens