Board Thread:General Discussion/@comment-130.245.192.22-20170629055623/@comment-25936766-20170816041959

ChishioKunrin wrote:

Side note: I like how we've all nicknamed the move "Aura slash", even though we don't really know for sure if it's Aura. Well, for starters, it cannot be anything else. Grimm Eclipse calls Blake's Aura Slash technique "Blade Beam" and mentions that it's an "energy blade".

We could try to argue that it's Dust.....but, color-wise, it does not fit any of the known Dusts (Gravity might be purple, but it's effect always appears black with purple edges, not violet like Blake's), nor does it fit their elements.

So yeah, it's Aura, because there's nothing else it can be.