Shade
Monster Junkie
The supernatural cold exuded by an ice mummy numbs all warm-blooded creatures that come within 25’ of the creature. Non-magical weapons used against the creature must save vs. crushing blow each time they hit the creature or freeze so cold that they shatter. Additionally, those who remain within 25’ of the ice mummy suffer 1d3 hp damage per round from severe frostbite.
Cold Aura (Ex): Anyone within 25 feet of an ice mummy takes 1d3 points of cold damage per round from the extreme cold of its presence.
And perhaps we can borrow from this...
Frostbrittle (Su): Any weapon that strikes Cryonax has its hardness reduced by 5 for 10 rounds, thereby increasing the effectiveness of sunder attempts against the weapon. In addition, rolling a 1 on an attack with the targeted weapon causes it to take damage equivalent to the amount it would have dealt on a successful hit.