The ability to have a Frost in your left and a Fire in your right and get that dual wield destruction bonus. You're dual wielding destruction spells, so, synergy!

Wouldn't fire and frost just cancel each other out for a -100% "bonus"?

Steam, man, it makes STEAM!

Haha, if that worked, it'd be awesome and we'd have: http://www.magickagame.com/

It's an idea, really. While I like the idea of fire and ice (Some say the world will end in fire; Some say in ice. (Robert Frost)), I also like a synergy idea-- spark and flames make thunderstorm, etc. And it could get some cool images (if the meshing of animations is doable, who knows, I know anims took ages in Oblivion).

When they first started talking about the spell system I imagined this to be possible. It's a great idea i would love to see in a magic mod.