I think it’d be cool if magical weapons, such as wands would be added. From code perspective they’d work like projectile ones, except they wouldn’t need ammo. As for balancing it, they’d use lots of stamina instead.
Suggested weapons for start:
Fire wand (has little chance of lighting enemy on fire which would be constant hp drain until fire is out – if such lit on fire enemy comes into contact with other mobs that are aggroed towards player or player, they’d have 50% chances of being lit on fire as well)
Ice wand (has a little chance of embedding target into a piece of ice, immobilizing it for some time)
Electric & poison wands (pretty much like fire wand, except without spreading status effect. Electric wand may have additional effect of paralyzing the target, aside of HP drain).