Gatta and Luzzu, Primal Vigor, and Walking Ballista

Prerequisites

• Gatta and Luzzu in hand
• Primal Vigor on the battlefield
• Walking Ballista on the battlefield
• available

Steps

1. Cast Gatta and Luzzu by paying
2. When Gatta and Luzzu enters the battlefield, it triggers, targeting Walking Ballista
3. Activate Walking Ballista by removing a +1/+1 counter from it, targeting itself, but instead putting two +1/+1 counters on it due to Gatta and Luzzu and Primal Vigor
4. Activate Walking Ballista by removing a +1/+1 counter from it, dealing 1 damage to any target
5. Repeat from step 3

Results

• Infinite damage
• Infinite +1/+1 counters on a creature