Only thing I have to say on this is that maybe some effect variation would be good, referring to the effect when you hold it.
They all have different effects, you can see whenever you walk and look at the trail of the ambient. Acid uses bubbles, fire uses cloud, and ice uses chunk.
Also, yes, most definitely I will add a healing spell.
Version 2 Added!Changes includeAcid has more direct damage (25) and 10DPS instead of 9.
IceBlast has more of a shakescreen effect, and 25 Direct Damage
Fire has 30 direct damage, and 7DPS.
Emitter explosions are more... thick.