Toltin the jeweler was once presented with a prize, dragon's teeth. Each one soaked and saturated in the elemental magic of the dragon it was ripped from. From those teeth through hours of grinding, forging and jeweling, he created a masterpiece. A set of dentures. 

Equipping these upgrades lizard folks bite attack to 2d8+strangth mod, damage type now becomes whatever element the dragon the teeth originated. Ex: red dragon=fire damage, silver dragon=frost damage.

the wielder can invoke the draconic nature of the teeth at the cost of their own safety.  On hit, the player can inflict 18d6 of elemental damage that the jaws inflict. If they do so, they must pass a dc10 dex save. The next time they do so, the dc increases to dc20. This increases each time the ability is used. Dc resets after a long rest.  If the roll is failed, then the player takes damage equal to the roll

Notes: Lizardfolk