Elenor's Blooded Vow

When you cast this spell, you shake hands and create an agreement between you and any other creature that is sealed by yours lives energy. The target must make a Wisdon saving throw (DC 21) to realize they been spelled. Also you can only be in a vow with a creature at a time, if you cast this spell again the latter is cosidered dispelled 

Either you or the target decide the circumstances of the vow, but both must agree with the terms, you can choose between being vague or highly specific. The spell will trigger when any of the stipulations is broken by one of the parties relesing the following effects

• Vow Breaker:

The target must make a Constitution saving throw (DC 21) It takes 10d8+40 necrotic damage on a failed save, or half as much damage on a successful one. 

The target must make a Constitution saving throw (DC 25) or be considered poisoned for the next 24 hours

• Oath Keeper

If the circumstances apply, the party that remained loyal to their vow can choose on either regain hit points equal to half the amount of necrotic damage dealt or gain temporary hit points equal to a quarter the amount of necrotic damage dealt