So you spend all your mist diving and getting that last bit of mats to craft your lovely new weapon, and post crafting you don't have any energy to test it out?!
So you have a couple guns and you're not really sure which one rocks the most damage?
So you suck and you need a little practice to get your timing down?
Enter the Guild Hall Test Dummy!
These could either be static dummies used only for testing numbers and showcasing your new weapons (Maybe one shaped like a knight with no weaknesses, and then a Beast, a Slime, and a Zombie Etc. For testing different weaknesses?)
Or if you're feeling really extreme over at OOO it could be dummy robo knights with different weaknesses that knockback and down, but don't deal actual damage!
Not really sure how hostile and non-hostile zones work in the code, but it seems fun!
Supporting this idea, though not enthusiastic about its implementation's chance of actually occurring.