Death Curse

A creature that kills you is struck with a mortal curse. Upon receiving a mortal blow, you target the creature responsible for your impending death, which must make a Charisma saving throw. On a failed save, you bind your soul to the target, afflicting them with a death curse immediately upon your death. The curse has a single, specific effect. For example, you may curse the target to suffer a painful disease that will kill them in one year and one day, or you may curse the target to become just like you, as with the true polymorph spell.

The effect of the curse is up to you, with the following restrictions:

• The curse can only affect the target, although it may influence how other creatures perceive or treat the target.

• The curse cannot immediately kill the target, although it may do so over the course of at least one day or longer. If the curse would kill the target in less than a year and a day, the target has advantage on its initial saving throw against this spell.

The curse is not affected by dispel magic. It can only be removed by the remove curse spell cast at 9th level or the wish spell. You may choose to set some other condition for the removal of the curse, such as when the target experiences genuine remorse for your death.

If the target dies while under the effect of the curse, the curse is passed along to its oldest offspring, if any. The curse continues to be passed down through the original target’s bloodline until either that bloodline ends or the curse is removed. You may choose to spare the target’s descendants when you cast this spell if you desire, in which case the curse ends when the target dies.

If you successfully cast this spell as you are reduced to 0 hit points but not killed outright, you immediately die instead of making death saving throws. While the curse lasts, you cannot be resurrected by spells such as raise dead. Casting speak with dead upon the target of the death curse will enable contact with your bound soul, and enable you to revise the terms of the curse or remove it if you so choose.

If you are mistaken as to the identity of your killer in the moment you cast the spell (for example, if the killer has successfully disguised itself as another creature), the spell fails and has no effect. If you know that your killer is acting on behalf of another creature, you may choose to target that creature instead, at the DM’s discretion.