Gatta and Luzzu, Walking Ballista, and Doc Samson, Super Psychiatrist

Prerequisites

• Gatta and Luzzu in hand
• Walking Ballista on the battlefield
• Doc Samson, Super Psychiatrist 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 Doc Samson
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 +1/+1 counters on a creature
• Infinite damage