Ice Armor is a Tanker primary powerset in City of Heroes. (It was briefly a Brute secondary powerset in the City of Villains Beta, but proved to counteract Fury.)
You can dramatically reduce your core body temperature to form various armors of ice around yourself. You can protect yourself from many different damage types, and you gain exceptional resistance to cold based attacks. However, this set offers little protection to fire base powers and no protection against psionics.
Activating this power draws moisture directly from the bodies of all nearby foes, draining their Endurance. Each foe you draw moisture from adds to your Endurance and Defense in the form of frozen armor. If there are no foes within range, you will not gain any bonus.
When you activate this power you cover yourself in Glacial Ice. The crystalline matrix of the armor has refracting properties that make Energy and Negative Energy attacks less likely to land. Also, Cold attacks deal less damage.
When you activate this power, you encase yourself in a block of solid ice, making yourself invulnerable, though you are frozen solid and cannot act. While Hibernating within this block of ice, you heal damage at an incredible rate. You also have endurance recovery while in Hibernation. This power lasts for 30 seconds. Your other toggles will remain active while in Hibernation but you cannot affect anyone during this time. You also cannot activate any powers until you come out of Hibernation.
Your body temperature permanently lowers to 33 degrees Fahrenheit. Permafrost gives you strong resistance to cold damage, and some resistance to fire damage as well. You also gain an inherent resistance to slow effects. This power is always on and does not cost endurance.
When you activate this power, you cover yourself in a thick coating of slick, melting ice. This makes you slippery, leaving you nearly immune to Disorient, Immobilization, Hold, Sleep, Slow and Knockback effects. This power also adds a slight increase in your defense to all attacks except Psionics. Wet Ice also reduces Cold damage and grants you resistance to Defense DeBuffs.