Talk:Demonic Idol Kikuri/@comment-181.112.7.220-20150608190743/@comment-24592751-20150608225051

Generally speaking, to activate extra skill you need only UBB unlocked and appropriate sphere (if applicable). For example,  I have a 7* Dianna at level 110 with UBB unlocked and her extra skill is active. Also, when you unlock your UBB, it will also state 'extra skill' unlocked.