User blog comment:Scythe Sasin/RWBY AU!/@comment-26470201-20160901224906/@comment-26470201-20160903010818

Huh, I never though of it that way. However, I don't think it neccessarily 'activates' like Yang's. Regardless of being hit or not, she can make spiked armour until she doesn't not have enough Aura to sustain it or just conserving it.

I was just trying to think of a sembelance that was not related to music.