Covenant

You swear a covenant with another creature, binding yourselves to a promise. When you cast this spell, both of you speak the same promise or a reflection of each others promise. While under the effects of this covenant , neither creature can willingly break the sworn promise. A creature only has to obey the written meaning of the covenant, not necessarily the intended meaning. Both creatures must be willing to swear the covenant at the moment of hearing the other creature's promise, or the covenant fails and the spell slot is lost. The covenant ends if either creature dies, or if another covenant is sworn between the same two creatures.