WHM Butterflies?

So I am not sure if anyone looked closely at the WHM weapon in the stormblood benchmark but it seems to have 2 butterflies flying around it as the whm has their weapon sheathed. I am not sure if this is an anesthetic part of the new weapon they get or is it an actual whm buff of some kind. What do you guys think?

I think they're part of the weapon. :B

After viewing Benchmark, I am convinced they are part of the weapon. They are welcome no matter the case. :)

I think it's part of the weapon :) If you watch the benchmark video at the slowest speed (x0.25) on youtube you can see the butterflies follow the weapon when the WHM casts. Either way, I really like it :)

Probably just aesthetic. floating buff creatures seems to be the purview of us scholars :3