The Thunder's Sigil [Magical Tattoo]

This tattoo has a different effect depending on where the subject has it placed. If placed on the head the character gains a Breath Weapon. Once per long rest, as an action the wearer can activate the tattoo to exhale energy of the chosen type in a 15-foot cone. Each creature in that area must make a Dexterity saving throw [DC: 22.]. And taking 3d6 damage of the chosen type on a failed save, or half as much damage on a successful one.

If placed on the hand and arm the wearer can activate the tattoo once per long rest as a bonus action, for 1 minute, all melee weapon attacks deal an additional 1d6 damage of the chosen type.

Blue/Bronze | Lightning Dragon Magical Tattoo hooked around the Neck