Weapon

Legendary Must be attuned Requires Attunement

Slumbering (Uncommon). Whenever you roll a 20 on your attack roll with this weapon, each creature of your choice within 5 feet of the target takes 5 damage of the type dealt by the dragon’s breath weapon. Stirring (Rare). The Stirring weapon has the Slumbering property. In addition, you gain a +1 bonus to attack and damage rolls made using the weapon. On a hit, the weapon deals an extra 1d6 damage of the type dealt by the dragon’s breath weapon.   Wakened (Very Rare). The Wakened weapon has the Slumbering property, and it improves on the Stirring property. The bonus to attack and damage rolls increases to +2, and the extra damage dealt by the weapon increases to 2d6.   As an action, you can unleash a 30-foot cone of destructive energy from the weapon. Each creature in that area must make a DC 16 Dexterity saving throw, taking 8d6 damage of the type dealt by the dragon’s breath weapon on a failed save, or half as much damage on a successful one. Once this action is used, it can’t be used again until the next dawn.   Ascendant (Legendary). The Ascendant weapon has the Slumbering property, and it improves on the Stirring and Wakened properties. The bonus to attack and damage rolls increases to +3, and the extra damage dealt by the weapon increases to 3d6.   The cone of destructive energy the weapon creates increases to a 60-foot cone, the save DC increases to 18, and the damage increases to 12d6.

Source: Fizban's Treasury of Dragons
Weapon (Any), Rarity Varies (Requires Attunement)

This weapon is decorated with dragon heads, claws, wings, scales, or Draconic letters. When it steeps in a dragon’s hoard, it absorbs the energy of the dragon’s breath weapon and deals damage of that type with its special properties.

Cost: 50000pp
Weight: 3lb