Bug: Vayne's W shows a 55/60/65/70/75 mana cost
With the new option to show mana cost on skills, Vayne's W shows a 55 mana cost at rank 1 and gets progressively higher as you rank it up.
With the new option to show mana cost on skills, Vayne's W shows a 55 mana cost at rank 1 and gets progressively higher as you rank it up.
I concur with this, and Varus's W has the same bug. Not sure if the mana cost leveled up as I wasn't really paying attention to it, but it definitely started out at 55 mana cost.