Assertion: rapier's blade | /r/CapableOf | break against thick bone
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text: I've tested quite a few myself very hard and never had this happen, but I have heard of it occurring - and there is this video on YouTube showing a "Konron forge" 9260 blade breaking against a thick bone (thicker than any human bone would be) - which would happen to almost any blade striking it - so they don't have magical powers that defy metallurgy or physics..! ;-)