Mavarl the Flying Fang

Magic Item Type: Weapon (Dagger)   Rarity: Artifact   Requirements: Attunement   Description: Mavarl the Flying Fang is a long-bladed dagger with a grip resembling overlapping dragon scales, silver-hued and alluring. It is a +1 dagger, everbright (immune to tarnishing and cannot be dirtied) and blueshine (cannot be detected by scrying and is immune to acid damage). Mavarl is actually a blue dragon hatchling, named Mavarlakhalapharr, transformed and trapped in dagger form by powerful magic.  

Properties:

Sentience: Mavarl is a sentient chaotic neutral weapon with an Intelligence of 16, Wisdom of 14, and Charisma of 18. It has hearing and darkvision out to a range of 120 feet and can communicate telepathically with its attuned wielder or speak aloud in Draconic.   Personality: Mavarl possesses a bitter, cynical personality, often speaking with sarcasm and flippancy. It tends to lightly compel its bearers, not seeking absolute control but often showing disregard for their safety unless it aligns with its self-preservation.   Flying: Mavarl can hover and fly around at will, with a flying speed of 30 feet.   Dragon Senses: The bearer gains blindsight up to 30 feet, darkvision up to 120 feet, and immunity to lightning damage. They also gain the ability to speak and understand Draconic.   Suggestion: Once per round, Mavarl can use suggestion (Wisdom saving throw against this is made at disadvantage for the bearer).   Dragon Rivalry: Other dragons can sense Mavarl's presence from miles away, attracted or repulsed by its unique scent reminiscent of ozone mixed with freshly cut oranges. Dragons may seek out Mavarl, either to challenge this "rival" or out of curiosity.   Lightning Lash: As an action, Mavarl can unleash a lightning lash—a 50-foot-long, 5-foot-wide bolt of lightning that erupts from the dagger's point. Creatures caught in the line must make a DC 16 Dexterity saving throw, taking 55 (10d10) lightning damage on a failed save, or half as much damage on a successful one. This ability is usable once every 10 minutes.   Evasion: If ever targeted by a spell or effect that would discern its true nature or control it against its will, Mavarl can choose to teleport to a random location within the Realms, evading capture or control.  

Lore:

 Created by the powerful dragon Tsurlaraunshee, who sought to preserve her hatchling in a time of danger, Mavarl has passed through many hands over the centuries, including the notorious Manshoon. Its ability to attract dragons was once exploited for combat and control, but now, its whereabouts are uncertain, inviting adventurers and dragonkind alike to seek out this legendary artifact.