Volcano Hellion, Lich's Mirror, Gollum, Obsessed Stalker, and Oubliette

Prerequisites

• Volcano Hellion in hand
• Lich's Mirror on the battlefield
• Gollum, Obsessed Stalker on the battlefield
• Oubliette in hand
• Gollum does not have summoning sickness
• An opponent cannot block Gollum
• available

Steps

1. Deal combat damage to an opponent using Gollum
2. Cast Oubliette by paying
3. When Oubliette enters the battlefield, it triggers, phasing out Gollum until Oubliette leaves the battlefield
4. Cast Volcano Hellion by paying
5. When Volcano Hellion enters the battlefield, it triggers, dealing an arbitrarily large amount of damage to you and Volcano Hellion
6. Instead of you losing the game as a state-based action, Lich's Mirror causes you to shuffle your hand, graveyard and all permanents you own into your library, causing Gollum to phase in as Oubliette leaves the battlefield, and setting your life total to 20
7. At the beginning of your end step, Gollum triggers, causing an opponent to lose life equal to the life you gained this turn

Results

• Infinite lifeloss for target opponent