Bloodletter of Aclazotz + Shard of the Nightbringer

Bloodletter of Aclazotz
Shard of the Nightbringer

Requires
Bloodletter of Aclazotz must be on the battlefield. Shard of the Nightbringer must be in hand. Mana needed: 5bbb
Steps
  1. Cast Shard of the Nightbringer by paying 5bbb.
  2. When Shard of the Nightbringer enters the battlefield, it triggers, causing an opponent to lose their entire life total due to Bloodletter of Aclazotz and you to gain that much life.
  3. The opponent loses the game due to having 0 or less life.
Results
Infinite lifeloss for target opponent. Near-infinite lifegain. Target opponent loses the game.