Alchemical Weapon

This strange, crossbow shaped alchemical apparatus functions as two-handed arcane focus and alchemist's tools.  While the same size as a typical light crossbow, the tool is designed for launching darts and vials, instead of crossbow bolts.  Due to its size and complication, the tool must be used two-handed.

While holding this tool, you gain a bonus to the spell attack rolls and the saving throw DCs of your artificer spells. The bonus is determined by the tool’s rarity.

As an action, you can focus on the tool to adjust the contained alchemical mix levels. Choose a cantrip that you don't know from the Artificer class list that deals acid, fire, necrotic, or poison damage. For 8 hours, you can cast that cantrip at will. Once this property is used, it can't be used again until the next dawn.

Notes: Bonus: Spell Attacks, Bonus: Spell Save DC, artificer