What's gayer than the boom of blunderbuss fire? An unending crackle of rapid, bone-crushing, meat-tearing cloud of blunderbuss volleys. Gaymli the Gay Dwarf dedicated his life to creating the biggest, loudest and gayest (depending on which end of the barrel you stand) blunderbuss ever to buss, and the result is an automatic blunderbuss - the AutoBuss.
From Gaymli's Manual for Manic Mayhem:
Hey you! Wanna have some fun? Then try my supergay Autobuss. Point the barrel at the bad guy, and then:
Roll 8d4 for damage. Damage can be split between creatures 5 ft from the target. If half or more of the dice results are 4, a misfire happens and the player looses their turn fixing the AutoBuss. If all the results are 4, the AutoBuss explodes knocking the player character down.
Remember!, works well in a crowded area!
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.
This weapon has the following mastery property. To use this property, you must have a feature that lets you use it.
Slow. If you hit a creature with this weapon and deal damage to it, you can reduce its Speed by 10 feet until the start of your next turn. If the creature is hit more than once by weapons that have this property, the Speed reduction doesn’t exceed 10 feet.
Notes: Ranged Weapon Attack: Piercing, Range, Two-Handed, Ammunition (Firearms), Burst Fire, Reload, Slow