FROST - Imperian Online Help

9.16 FROST

Frost represents the body's ability to resist extreme cold. At a certain level
within the skill, you will gain total immunity to the vagaries of normal
weather, and as you increase generally, your resistance to cold-based attacks
will increase.

Once you have transcended the skill of Frost, you will gain the ability to HEAT
BLOOD, which will act as a defence against freeze attacks.