Volcano Hellion, Pariah's Shield, and Boros Reckoner

Prerequisites

• Volcano Hellion in hand
• Pariah's Shield on the battlefield
• Boros Reckoner on the battlefield
• available

Steps

1. Cast Volcano Hellion by paying
2. When Volcano Hellion enters, it triggers, dealing an arbitarily large amount of damage to you and a creature
3. The damage that would be dealt to you is dealt to Boros Reckoner instead due to Pariah's Shield
4. Boros Reckoner triggers, dealing an arbitrarily large amount of damage to an applicable target

Results

• Infinite damage to target opponent