Talk:Gameplay:Brave Burst/@comment-26175314-20150307085517/@comment-64.160.68.37-20150422184224

When a BB level is increased, a unit's BB either: deals more damage, have better chances to inflict status conditions, recover more hp, have stronger buff effects (atk, def, rec), or just lower the bc cost to activate the BB. This also applies to the SBB. Buffs like crit rate and spark damage aren't affected. Each unit is different, for example, like Narza, gets a bc cost reduction, his bb needs 31 bc when bb is level 1, but only needs 22 bc when bb is max. SBB is the same, level 1 SBB requires 3o bc, max level SBB requires only 21 bc. This is why some people max out both bb and sbb on their 6* units. Especially 7* units because of the UBB.