Board Thread:Questions and Answers/@comment-26361493-20150816204015/@comment-26083479-20150817120741

It doesn't ever state anywhere that it's for one turn. It says at the start of the UBB description it's for 3 turns - if it doesn't specify again, then it will be that amount of turns.

U ltimate  BB: Blue Star's Fate[Heal/Support] Recovers HP for all allies for 3 turns, negates all status ailments, reduces damage taken by 75% & boosts BB gauge when attacked  I know, I know! It's confusing, but that's how things work - translations from Japanese to Global are not too friendly. There are multiple spelling mistakes in some BBs that annoy the shit out of me.