And... this is not WoW.
As for DnD, I have the DnD, Advanced DnD, 2nd ed of Advanced DnD, skills and powers, and 3rd ed ADnD and other spellbook compendiums, so I'm a wee bit versed on different created spells.
But, this is not WoW and if it was, Frost Shock would be for warlocks and Sorcs would get prismatic spray. Rawr.
Quote:
Prismatic Spray
Evocation
Level: Sor/Wiz 7
Component: V,S
Casting Time: 1 action
Range: Close (25 ft + 5 ft/ 2levels)
Area: Cone
Duration: Instantaneous
Saving Throw: See Text
Spell Resistance: Yes
This spell causes seven shimmering intertwinced, multicolored beams of light to spray from your hand. Each beam has a different power. Creatures in the area of the spell with 8 HD or less are automatically blinded (see blindness/deafness) for 2d4 rounds. All createsure in the area are randomly struck by one or more beams, which have additional effects.
1d8 Colour of Beam Effect
1 Red 20 points fire damage (Reflex half)
2 Orange 40 points acid damage (Reflex half)
3 Yellow 80 points electricity damage (Reflex half)
4 Green Poison (Kills; Fortitude partial, take 20 damage instead)
5 Blue Turned to stone (Fortitude negates)
6 Indigo Insane, as insanity spell (Will negates)
7 Violet Sent to another plane (Will negates)
8 Struck by two rays, roll again twice ignoring all 8s rolled.
Have it cost as much as petrify if not a little more and a similar casting time, and put feeblemind instead of insane, pure damage instead of kill for poison, and random teleport instead of sent to another plane. That and up the damage to make it comparable to other damaging master level spells, and I think you have a winner!
*edit* Alea, it's not in my copy of 3rd ed player handbook, the rest of my books are in storage.