Ice-based enemies?

[Pax Concord]

I'm trying to come up with a sort of anti-adventuring party as a foil for the party I'm GMing. Each character will have a nemesis of sort in the enemy party; one which will be fun to fight against.

One of the characters is a Nimro Fire Giant Mystic OCC. I'm trying to come up with an ice-based opponent as a foil. Something able to use magic would be good. Any ideas? There's a frost giant of some sort (Algor? Algol?) but that's a bit too blatant "mirroring," methinks. I'll use it if there's nothing better, but I'm sure that there must be SOMETHING!

[AzathothXy]

Ice Monster(elemental): Dark Conversions
Winter Storm Ice Demon: Dark Conversions

[RoadWarriorFWaNK]

the problem with ice mosnters is they are frequently vulnerable to fire-based attacks, putting them at as much of a disadvantage as a fire giant would be. My advice is to send them against an enemy that is completely impervious to fire (like many demons, check out the red flame demons in Dark Conversions especially), or place the giant in an environment where fire does not work (i.e. a vacuum or underwater).
warlocks are good too.

[Cinos]

I'd go with the Winter Storm Ice Demons, from the Northern Hinterlands (I think MD stats are also in Dark Conversions), and mabye beef it up if needed. If you want someone who's really powerful, give them the item Heart of Ice, also from Hinterlands.

Cinos

[grandmaster z0b]

A HU styled mutant with Ice powers is another possibility.

How about a Techno-Wizard with ice based weapons and armour that's impervious to fire and/or a lightning rod that makes him impervious to energy?