Well since it's June 14th and the tokens are still going on, then it must be a permanent feature!
Good luck to all who will be aiming for the Goku Dogi!
i wouldn`t waste tokens on that, you can buy it in AH not expensive instead you can upgrade TMQ1-UD1 gear with that stones and earn some money if you get +10, in same time you practice that upgrade and find out some tricks about it, i did it now im starting to know how dat upgrade system work i make items +11-13 easy(still scared to upgrade lv70 items though) :D