Shard of the Nightbringer + Sanguine Bond

Shard of the Nightbringer
Sanguine Bond

Requires
Shard of the Nightbringer must be in hand. Sanguine Bond 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. Sanguine Bond triggers, causing the opponent to lose life equal to the amount of life gained this way.
  4. The opponent loses the game due to having zero or less life.
Results
Infinite lifeloss for target opponent. Target opponent loses the game.