Custom Spells

I have been messing around making custom spells for a while, all fire based ones.. for an RPG i will be making soon.. anyways.. The first ones I made were Fire Bolt (Kinda Like Storm Bolt), Fire Storm(kinda like Blizzard) and Flaming Aura (like Immolation) i need a level 6 ultimate spells... plz reply with any ideas.. I will try to add the map to this post to see what you think...

Why not a Rain of chaos based spell that causes 300 damage to 4 target areas. You can just make a trigger to remove the inferals afterwords. And maybe Metamorphisis can become Fire imbue were your hero becomes imbued with a fire demons blood for a short while. And searing arrows could be used as a melee spell and have tank impact or something as the effect of the spell. Frost nova could become Fire pillar, which would hit a single unit for 200 damage and an additional 300 to it and all units around it. You could make fire armor from frost armor, just change it to the imolation instead of the frost sheilding. And mirror image could be something like double up, which would create one exact copy of the original exactly but only lasts 15 seconds or so. And maybe Fire Blast, which would be a one wave starfall that hits everything in a large area for 100 or 200 damage. And you could make a spell out of finger of death, maybe a 3 lvl spell, that deals 200 damage, 400 damage, then 600 damage at final lvl. Just remember that some spells have effects in the first place like stunning, so you gotta build around that fact.

You can give the effect a duration of 0. So when the spell is cast, for example a spell based off storm bolt, it won't stun the unit. Same goes for frost nova, just change the slowing duration to 0. Haven't actually tried this yet but i know the fields are available in AbilityData.slk. So theoretically it should work.