Talk:Windblast/@comment-2017893-20130204061943/@comment-5607198-20130909172840

I think he's referring to their mana cost, which is covered by Corvo's regen (so that even if you ran out of magic, you can still Blink)

DV aand Blink are the only spells that cost that little. Because you can cast them as much as you want, they are "free"