Sacrosanct (5e Feat)
From D&D Wiki
You are favored by your god. As such, should you be murdered, he or she will bring divine retribution upon your killer. Once a creature kills you, that creature is affected by a curse of your choice as per the bestow curse spell with the following exceptions:
- First, there is no save allowed.
- Second, the duration is until the spell is dispelled, and it does not require concentration.
- Third, the curse can only be broken by a wish spell, or by direct divine intervention.