Shard of the Nightbringer + Wound Reflection

Shard of the Nightbringer
Wound Reflection

Requires
Shard of the Nightbringer must be in hand. Wound Reflection must be on the battlefield. Mana needed: 5bbb
Steps
  1. Cast Shard of the Nightbringer by paying 5bbb.
  2. Shard of the Nightbringer triggers, causing an opponent to lose half their life total, rounded up, and you to gain life equal to the life lost this way.
  3. At the beginning of your end step, Wound Reflection triggers, causing each opponent to lose life equal to the life they lost this turn.
  4. The opponent targeted in step 2 loses the game due to having zero or less life.
Results
Infinite lifeloss for target opponent. Target opponent loses the game.