Glacial StormI could be wrong, but I think they're keeping the initial cost of activating it and just lowering the cost of maintaining it.
* Initial mana cost increased to 100/150/200 from 25/35/45
* Cost per second reduced to 40/50/60 from 50/70/90
* Slow duration reduced to 1 second from 2.5
Nvm, not a complete buff but overall it turns to a buff. It's only 30 more mana at rank 1 to start it, and after 3 seconds it would be the same overall cost. After rank 1 though, it starts to completely **** the old ult mana wise.