Vigor, Walking Ballista, and Quest for Pure Flame

Prerequisites

• Vigor on the battlefield
• Walking Ballista on the battlefield
• Quest for Pure Flame on the battlefield
• undefined

Steps

1. Activate Quest for Pure Flame by removing four quest counters from it and sacrificing it, doubling the amount of damage sources you control deal this turn
2. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, putting two +1/+1 counters on it due to Vigor
3. Activate Walking Ballista's second ability by removing a +1/+1 counter from it, dealing 2 damage to any target
4. Repeat from step 2 as desired

Results

• Infinite damage
• Infinite +1/+1 counters