Vitriol

Description:

Weapon (dagger), legendary (requires attunement)

This curved blade fashioned from the tooth of a cave dragon and still housing the soul of the beast constantly yearns to hunt and spill the blood of worthy living creatures. The more time passes since it has last drawn blood, the more heavy the atmosphere of barely suppressed violence around it becomes.

Vitriol grants a +2 bonus to attack and damage rolls made with this magic weapon. It has the following properties:

Hunter’s Tool. Attacks made with Vitriol ignore the natural armour of living creatures. Other types of armour as well as the natural armour of non-living creatures such as undead creatures and constructs are unaffected by this effect.

Exude Toxin. When the user hits an opponent with a melee attack using Vitriol, they may use a mental command to activate this ability. Vitriol deals 2d6 additional poison damage to the target and 1d6 poison damage to the user. If it takes any damage from this ability, the target must succeed on a DC 15 Constitution saving throw or become poisoned until the end of its next turn.

Blindsight. While Vitriol is drawn, its user gains blindsight out to a range of 5 feet.

Sentience. Vitriol is a sentient neutral evil weapon with an Intelligence of 12, a Wisdom of 12, and a Charisma of 20. It has hearing and blindsight out to a range of 10 feet.
The weapon has hearing and can understand Draconic. It can communicate with its wielder telepathically. Its messages using telepathic communication tend to involve non-visual qualia which enhance the mood they carry.

Personality. Vitriol houses the soul of an adult cave dragon (see p.125 of the Tome of Beasts for details). Through its prolonged entrapment in the Labyrinth, the dragon has been starved for the only stimulation left in its existence as a tool for killing: the thrill of the hunt.
The dagger’s purpose is to hunt and kill living creatures. It cares for nothing else than this thrill it receives from tasting blood. As the hunt is on, it will spontaneously start communicating its emotions with the user. As long as the user is able to slate this thirst, Vitriol does not care for their alignment.
If Vitriol’s user is not a reptilian creature or if the user goes by a number of days equal to the CR of the most challenging creature it has killed within the last 24 hours (CR’s lower than the number of days remaining from a previous kill do not affect the counter), a conflict occurs between it and its wielder the next time the wielder draws Vitriol.

Bio:

Vitriol

Raakamah, City of Monsters VariSami