User blog comment:D Man o3o/Rumor: 7 Star SBS Unit Info/@comment-50.53.5.23-20150716131404/@comment-124.217.139.228-20150721084120

So you won't evolve a 6star unit to a 7star?If you have enough cost,why not?.you would be really stupid not to evolve, the unit gains a stats buff,extra skill,LS upgrade,UBB Skill, BB/SBB upgrade.