This is a core suggestion that I want an opinion on from the mage people at MMO-Champion. This being before I post it in the suggestion board on the offical WoW board.
Spell:
I came up with this idea for a spell while doing the quest "Drakkari do not need water elementals" as my level 75 frost mage, granted this spell is an obvious mix of Frost Nova and Blastwave, I can see it as a possible mage spell in the future. Critism input from experience mages desired.Frostfire Nova
200 mana
Instant Cast 30sec cooldown
A wave of frostfire shoots outward from the caster's feet, scorching and freezing all enemies caught within the blast for 300-500 Fire damage and 100-200 Frost damage. Knocking them back and freezing them in place for 5 seconds. Damage may disrupt the freezing effect.
Possible Glyph:
Glyph of Frostfire Nova
Removes the Knockback ability of your Frostfire Nova, instead replaced it with a damage over time effect. Dealing 1000 damage over 10 seconds.