True Name Nunchuck (Legendary)

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

This weapon is ornately decorated with elegant details in brimstone and obsidian. It smells of iron and incense. When you attune to this weapon, you must whisper your true name to it. The name sears across the weapon in Infernal runes, then fades. The typical True Name, an uncommon item, empowers an illrigger's Baleful Interdict. Whenever you roll an 18, 19, or 20 on your attack roll with this weapon and place a seal on a creature as part of the attack, you can place an additional seal on that creature. You gain a +3 bonus to attack and damage rolls made using the weapon, and the damage dealt by your seals increases by 3d6. In addition, when you reduce an enemy to 0 hit points, you can choose to regain two seals and gain temporary hit points equal to your illrigger level (no action required). Once you regain seals and gain temporary hit points in this way, you can't do so again until the following dusk.

"The weapon known as True Name is inseparable from the history of the Seven Cities. Whenever two devils entered into a deal with one another, the offeree of the contract would seal their true name into its ornamentations, then the blade would remain in the possession of the offerer. Should the offeree fail to uphold their end of the contract, the offerer would magically learn the name from the blade, thus gaining power over they who betrayed the sacred pact. Is there, thus, any blade with more potential? It is written that if an infernal soul could discover the true name of the weapon itself, they could draw from it every name sworn to it since the blade's creation. Imagine the power that individual would have over the Seven Cities. Imagine the proud devils who could do naught but fall to their knees. I have sought the blade's name for centuries. With luck, when I find it, its bearer will not know the power they wield, and it will be mine." — Infernal Chancellor Lazivos's personal writings

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: The Illrigger Revised p. 38 (Third Party), Heliana's Guide to Monster Hunting - Part One