Board Thread:Questions and Answers/@comment-5149755-20150409001207

Sorry if I chose the wrong board or whatever it is.

I've been looking all over but I've yet to find anything concrete explaining it: How often does a new Skill Slot open up?

I'm looking to confirm it. From watching the Anime I'm guessing a new one opens every 10 Levels. I got that since you start with 2 and Kirito had 12 at level 90+ (94 I think). I'm assuming that Unique Skills open a hidden slot since, if I recall correctly, Kirito said that 'one day it just appeared' (Or something similar) meaning that it just appeared out of nowhere while Extra Skills require you to have an Empty Slot for them to fill when you do the quest (Or other requirement) to get the Extra Skill. 