Talk:Ice Legend Selena/@comment-37.135.69.139-20151224111649/@comment-27030663-20151224141008

You have to Level up your Brave Burst (BB) to level 10 to unlock Super Brave Burst (SBB), then level up your SBB to 10 to get your Ultimate BB, which unlocks automatically your Extra skill. This Applies to every 7* unit. Do note that you will need her special Sphere "Lexida" for her extra skill to work out.