Ice Armor

Ice Armor is a Cold spell used by s in Diablo III. It bears some resemblance to the classic Sorceress skills Frozen Armor, Shiver Armor and Chilling Armor.

In-game
Ice Armor counts as an Armor spell, and only one Armor can be active at a time. It is arguably the most risky of the three Armor spells available to the Wizard, as it only takes effect in melee combat. However, it can be a useful skill for melee-orientated Wizards. Chill slows enemies' movement speed by 60%, triggers if the attacker cannot be frozen, or if they have been recently frozen by Ice Armor.

The damage reduction only applies to melee attacks, including ground-based monster affixes.

Runes

 * Chilling Aura: all enemies within 15 yards are chilled, slowing their movement speed by (unlocked at level 21).
 * Crystallize: whenever the Wizard is struck by a melee attack, their Armor is increased by for  seconds. This effect stacks up to  times (unlocked at level 31).
 * Jagged Ice: melee attackers also take damage as Cold (unlocked at level 42).
 * Ice Reflect: Melee attacks have a chance to create a  centered on the attacker, dealing  damage as Cold and Freezing all affected enemies for  seconds (unlocked at level 49, does not benefit from any enhancements to the existing Frost Nova skill).
 * Frozen Storm: also deals damage as Cold every second to enemies within 15 yards. Affected enemies are Chilled (unlocked at level 53).

Non-rune enhancements

 * Halo of Arlyse (Legendary Ring): increases melee damage reduction of Ice Armor to 50-60% and casts if damaged quickly.