Defiling Daemogoth, and Soul of Eternity

Prerequisites

• Defiling Daemogoth on the battlefield
• Soul of Eternity on the battlefield

Steps

1. Deal combat damage using Soul of Eternity, doubling your life total due to its lifelink
2. At the beginning of your end step, Defiling Daemogoth triggers, causing each opponent to lose life equal to the life you've lost this turn

Results

• Near-infinite lifegain
• Near-infinite lifeloss