User blog comment:Blindsighter101/Guess the Skylander/@comment-24958008-20150626192047/@comment-25574005-20150626214129

Here's artwork of Razor Sharp Blades. Uh, I have an explanation for his..........new cross species.

The answer to your question, BH, is that he doesn't actually hold the knife. He has a bunch of knives attached to his wing from an accident with one of Pop Fizz's potions and a special gem.

The knives have been upgraded to be ghost knives.