K'rrik, Son of Yawgmoth, Pontiff of Blight, Mourning, and Birgi, God of Storytelling // Harnfel, Horn of Bounty

Prerequisites

• K'rrik, Son of Yawgmoth on the battlefield
• Pontiff of Blight on the battlefield
• Mourning in hand
• Birgi, God of Storytelling // Harnfel, Horn of Bounty on the battlefield
• You control at least four creatures
• You have at least three opponents
• plus either or available

Steps

1. Cast Mourning by paying and 2 life if able, or otherwise
2. Each creature you control's extort ability and Birgi trigger
3. Resolve the Birgi trigger, adding
4. Resolve the first extort trigger, causing you to pay 2 life if able, or otherwise, causing each opponent to lose 1 life and you to gain that much life
5. Repeat step 4 for each remaining extort trigger
6. Resolve Mourning, attaching it to a creature you control
7. Activate Mourning by paying 2 life, returning it from the battlefield to your hand
8. Repeat until an opponent loses the game due to having 0 or less life

Results

• Near-infinite lifegain
• Near-infinite lifeloss
• Near-infinite lifegain triggers
• Near-infinite storm count