User blog comment:Mich, Michele & Kuhla/Future Units Preview/@comment-10070597-20160330225655/@comment-27842868-20160331122444

There are these new features called SP (I think that's what it's called) for Omni/Dream-Evo Units. Basically, you fuse fodder units into your Omni-Evo unit to get SP kind of like how you fuse unit to level up Brave Bursts. You can have a maximum of 100 SP for each Omni-Evo unit. SP can be used to unlock extra "extra skills" for your Omni-Evo Unit. Each one costs different amounts of SP based on how good they are. They usually add extra effects to BB/SBB/UBB or upgrade preexisting skills. For example, one of Omni-Evo Vargas' SP boosts his UBB BB attack up modifier from 600% to 900% or something. There are a bunch of different skills you can unlock using SP, but you only have 100 points to you have to invest wisely. To unlock these extra skills, your Omni-Evo unit must be max level and have UBB.

I hope this was helpful.