Volcano Hellion, and Heliod, Sun-Crowned

Prerequisites

• Volcano Hellion in hand
• Heliod, Sun-Crowned on the battlefield
• available

Steps

1. Cast Volcano Hellion by paying
2. Volcano Hellion enters the battlefield, triggering its ability
3. Holding priority, activate Heliod by paying , giving Volcano Hellion lifelink until end of turn
4. Resolve the Volcano Hellion trigger, dealing an arbitrarily large amount of damage to you and target creature, and causing you to gain life equal to the total amount of damage done this way

Results

• Infinite damage to target creature
• Infinite lifegain