Example: Burst of Glacial Wrath has 30d6 damage dealt to everything that is not immune to cold (unless one's a frostmage). On average, that's a higher dmg output than Moonfire does to undead already. Then, if you bonk non-undead and non-shapechangers with that spell, you deal half of that dmg. Thematic, I suppose, but it still leaves a 9'th circle spell largely underwhelming.A cone of fiery white moonlight springs from your hand. Living creatures in the area feel an unnatural chill and take 1d8 points of damage per two caster levels, to a maximum of 10d8. Undead and shapechangers take double damage. This application of the spell allows a Reflex save for half damage. Disguised, shapechanged, or polymorphed creatures and objects in the spell's area at the time the spell is cast must make Will saves or immediately return to their normal forms.
Reflex save: Evasion negates. Will Save: the majority of your polymorphers have high will saves. You'll have to be a DC mage of beyond a high calibre for it to work.
Can we consider a buff on that, please? For a spell that you can only access from a single domain- you'd think it should be useful and a good buy-in reason