Vertebrae Sword

Special: The jagged vertebrae sword of a fishfolk warrior can barely be called a sword. Locals would say it's better described as a makeshift weapon crafted from a fish skeleton and sea trash. Its poor construction is the reason it's not often a weapon seen on land, though when used by a skilled fighter, it most certainly can be a formidable tool. When you successfully hit a creature with a vertebrae sword, you can use a bonus action to rake and twist the weapon, breaking off some of the sword's boney barbs and dealing an extra 1d8 piercing damage. The vertebrae sword can only be used in this way 5 times before it becomes unusable as a weapon.

Proficiency: martial, vertebrae sword Source: Obojima: Tales from the Tall Grass p. 158 (Third Party)