Lyla, Holographic Assistant, Snake Umbra, and Walking Ballista

Prerequisites

• Lyla, Holographic Assistant on the battlefield
• Snake Umbra on the battlefield
• Walking Ballista on the battlefield

Steps

1. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to an opponent
2. Walking Ballista triggers, causing you to draw a card
3. Lyla triggers, putting a +1/+1 counter on Walking Ballista
4. Repeat

Results

• Near-infinite damage
• Infinite card draw
• Infinite draw triggers