Your mage armor is imbued with frost.

Prerequisites: Hyperborean level 3 , Medium Armor Proficiency

Benefit: Under the effect of Ice Armor, any opponent which attacks you in melee must make a fortitude save or is slowed until the end of his next turn. This can possibly decrease a full-attack into a standard attack. Each opponent only has to make one save per turn even if he attacks the hyperborean multiple times.