Board Thread:New on Brave Frontier Wiki/@comment-112.206.102.174-20150718040733/@comment-26464987-20150827034026

Whenever you have a unit that is a 7 star unit and his SBB is maxed after maxing his BB. (So basically maxing your BB twice). You get what is called an UBB. A.k.a Ultra Brave Burst. This UBB is something that any unit that has UBB can use if the overdrive meter is full. The overdrive meter is something that you see in game that is filled over time as you fight the units and it gains energy(the red bar bellow all your units). Once you reach the end of the overdrive meter, if you swipe left on your level 7 unit, instead of swiping up, you instead active your unit's UBB. Activating the UBB on a unit, uses your current Overdrive meter onto that unit. The UBB requires time to charge so you will commence attacking before your UBB on that unit you charged is filled. You have up to 3 turns before you lose your UBB on that unit. Once your unit's UBB is fully charged, you will swipe up and it actives his UBB dealing tons of damage.