Might have been already suggested or a bad idea.
But I wanted to suggest adding utility items for slayers to help them fight demons here some suggestions :
-Wisteria Powder :
Stocked into a pouch this powder has the strange characteristic of fending off demons
In game effect : the slayer throws the powder in a curved motion upwards (imagine throwing sand) and if the demon is in range it stun him for a very short time (works only on demons and not humans)
-Invisibility Talisman
Made by a friendly demon this Talisman allows the user to turn invisible
In game effect : turn the user invisible for 10 seconds making him not detected by npc and not visible by players
However if the user attack or is hit he becomes visible again even of the effect didn't run off
-
Shotgun
American breathing !!!!!
In game effect : shoots multiple bullets (each bullet deal slight damage but if all bullets hit they can deal what is considered low to mid damage)(depending of the opponent level it might stun or not) -
Antidote
Made by a genius medical researcher this Antidote might heal demonic poison or if it is too strong decrease it effects
In game effect : was said in the description -
Mercenary contract
A contract made between you and 2 mercenaries that will help you when you are in need however won't you feel any guilt sending them to certain death ?
In game effect : summon 2 npcs that are a bit stronger than your average bandit these 2 npcs will attack the last target you have hitted (or aimed at)
Hope it is useful and feel free to add more ideas