Guild Wars 2

For all of my characters, the farthest right space of the initial tier of Elite skills is inaccessible. If I pass my cursor over it, it tells me I must have a special version of the game to open it. Can someone explain please?

Mistfire Wolf is automatically unlocked when you’re owning the deluxe edition or collectors edition.

http://wiki.guildwars2.com/wiki/Mistfire_Wolf