Akroan Signet Ring

This gilded ring bears a beautiful engraving of one of the seven warriors who first established the Kolophon, either the ram, lion, horse, boar, badger, bull, or hart. 

Seven varieties of Akroan Signet rings exist, each with a different signet (see the table below). A ring's signet determines its rarity as well as the additional spells it can cast. Each ring is unique to denote the identity of its particular owner. While wearing an Akroan Signet, you can cast each of its additional spells once from the ring using your Strength as the spellcasting ability. Once you cast each of the additional spells from the ring, it can't cast the spell again until the next dawn.

If you attempt to cast a spell using an Akroan Signet ring from a family you are not a member of, by blood or by marriage, the ring explodes and is destroyed. Each creature in a 15-foot-radius sphere centered on the ring must make a DC 16 Dexterity saving throw. A target takes 8d8 fire damage on a failed save, or half as much damage on a successful one. This explosion ignites flammable objects in the area that aren't being worn or carried.