Jaw Breakers Nunchucks (Rare)

Nunchucks are martial melee weapons composed of two hard batons connected to one another by a short chain.

Forged as a pair, these magic weapons are crafted from the matching upper and lower jaw bones of a tarrasque. Their innate magic—and one of the reasons the tar-rasque's bite is so powerful—creates an arcanomagnetic pull between the two jawbones, dealing devastating damage to whatever lies between them. You gain a +1 bonus to attack and damage rolls you make with each of these magic weapons. These weapons deal piercing damage instead of their usual damage type.

Chomp: When you engage in two-weapon fighting using these two weapons and hit the same target with both weapons, the attack you make with your second weapon deals an additional 1d8 damage.

Optional Attunement: You can choose to attune to a pair of jaw breakers. They count as a single magic item with regard to the number of magic items you can attune to. When you do so, the weapons gain the Swirling Dervish property while you are attuned to them.

OA: Swirling Dervish: Harnessing the power of the blades, you leap over a target, becoming a tornado of lacerating blades. As an action while you wield both jaw breakers, you can perform a magically-enhanced jump, attacking creatures you pass over. This jump has a maximum distance of 20 feet, is a straight line, must end in an unoccupied space, does not provoke attacks of opportunity, and each foot you clear on the jump costs one foot of movement. You can make one attack against a creature under you in each 5-foot space over which you jump. These attacks always alternate main-hand, then off-hand. For example, if you jumped over one Huge creature, you could make three attacks against it (the second one dealing Chomp's extra damage on a hit). If you jumped over three Medium creatures, you could make one attack against each (with no extra damage from Chomp).

Special: Flourish. When you are wielding the nunchucks in two hands and take the Attack action on your turn, you can attempt to flourish with the weapon immediately before you make your first attack. To flourish, make a DC 13 Dexterity check, adding your proficiency bonus if you are proficient with nunchucks. On a success, you gain a +2 bonus to the first attack roll you make this turn. On a failure, you deal bludgeoning damage to yourself equal to your proficiency bonus and gain no bonus from your flourishes this turn.

Finesse: When making an attack with a finesse weapon, you use your choice of your Strength or Dexterity modifier for the attack and damage rolls. You must use the same modifier for both rolls.

Versatile: This weapon can be used with one or two hands. A damage value in parentheses appears with the property—the damage when the weapon is used with two hands to make a melee attack.

Proficiency: martial, nunchucks Source: Heliana's Guide to Monster Hunting - Part One p. 488, Heliana's Guide to Monster Hunting - Part One