Baby Face's Blaster

The Baby Face's Blaster has an innate ability to drastically increase the speed of it's wielder once it is successfully charged. To charge the weapon the attuned has to deal damage with it. For every attack hit the weapon gains one charge. Once the weapon has five charges the weapon will automatically cast the Haste spell on it's wielder, which still requires concentration from the wielder. However, if the attuned takes damage while using this weapon it will lose a charge for every attack hit for a minimum of 0 charges left. All charges stored in the weapon will fade at the end of a long rest. If the weapon gains enough charge to cast Haste it's charge count is also reduced to 0 and will not gain any more charge until Haste has faded.

It’s up to you to decide whether a character has proficiency with a firearm. Characters in most D&D worlds wouldn’t have such proficiency. During their downtime, characters can use the training rules in the Player’s Handbook to acquire proficiency, assuming that they have enough ammunition to keep the weapons working while mastering their use.

Notes: Damage, Buff, Combat, Range, Two-Handed, Ammunition (Firearms), Reload, Push