- Blizzard Ice shards pelt the target area, dealing [ 114.4% of Spell Power ] Frost damage over 8 sec and reducing movement speed by 50% for 15 sec. Each time Blizzard deals damage, the cooldown of Frozen Orb is reduced by 0.5 sec. Mage - Frost Spec. Mage - Frost Spec. 2.5% of Base Mana. 35 40 yd range. 8 sec cast (Channeled). 8 sec cooldown.