Heartless Hidetsugu + Wound Reflection

Heartless Hidetsugu
Wound Reflection

Requires
Heartless Hidetsugu must be on the battlefield. Wound Reflection must be on the battlefield. Each opponent has an even life total. Heartless Hidetsugu does not have summoning sickness.
Steps
  1. Activate Heartless HIdetsugu by tapping it, dealing damage to each player equal to half their life total, rounded down.
  2. At the beginning of your end step, Wound Reflection triggers, causing each opponent to lose life equal to the life they lost this turn.
  3. Each opponent loses the game due to having 0 or less life.
Results
Each opponent loses the game. Near-infinite damage to all players. Near-infinite lifeloss.