Ok, so heres what i've been noticing. When a mage iceblocks, he/she receives a 30 second debuff called Hypothermia. This prevents the mage from iceblocking again for that duration. All frost mages have Cold Snap, which finishes the cooldown on ur frost abilities just like a rogues Preparation finishes the cooldown on his/her abilities. Hypothermia prevents a double iceblock, whereas the rogue can chain his abilities without any debuff, allowing for some serious survivability/damage. I would like to see rogues get a similar debuff after using vanish or cloak of shadows , or take away Hypothermia. Comment away ^^