Talk:Semblance/@comment-70.27.60.223-20151031212444/@comment-27087951-20151102004830

Fully obsidian is actually a pretty bad idea. Sure, it slices things like butter, but breaks too easily (prevented here with Aura). The aztecs, who used obsidian constantly, didn't even use obsidian weapons per se, but rather wooden weapons with obsidian edges. So the weapon itself wouldn't break, and still slice easily.

Also, surgeons don't really use obsidian scalpels except in the most desperate times. Actually, last time I checked they used simple obsidian, not obsidian scalpels, in such cases. Obsidian alone already slices better anyway.