War Elemental, and Shalai and Hallar

Prerequisites

• War Elemental on the battlefield
• Shalai and Hallar on the battlefield

Steps

1. Any opponent takes damage
2. The War Elemental triggers, putting a counter on a permanent
3. All Shalai and Hallar triggers, dealing at least 1 damage to an opponent
4. Repeat from step 2

Results

• Infinite damage