Ultimate Adventurer's Handbook
Oath-Sealing Covenant
1-level Divination
Ritual - does not require spell slot, takes 10 minutes longer
Casting Time: 1 minute
Range/Area: Touch
Components: V, S, M
Materials: two rings
Duration: Special
When two creatures make a promise to one another, you seal it with magic and a prayer. If either creature breaks the promise they made, the other immediately knows the promise has been broken and this spell ends. If this spell ends as the result of another spell, both creatures become aware of that fact.