Contact Home Power

You blow a small horn and call your deity. This establishes a tenuous link through the astral plane between you and your deity or the seat of their power. For the duration of this spell, you can regain spell slots as you normally would. When you complete this ritual, you regain all spell slots of 3rd level or higher that you didn't regain on your last long rest.
If your deity has abandoned a sphere, eitehr through force or of their own choosing, this spell will fail. The caster will learn from the spell whether their god isn't willing to return to this sphere or if another god is blocking their return. Repeated attempts may call unwanted attention to the caster.