I remember there's an Asian martial arts technique (especially China, and I believe India also has it but I don't know which tag to use for that) that solely uses their forearms for strikes and blocks as their primary technique. Usually wearing vambrace/bracelet as their weapons, here is the Asian military bronze vambrace.
I remember that a historical artifact also has protruding spikes, probably used by this martial arts duelist, but I can't find it on the web.
