What is 'Crushed Bones'?

Question

While playing with a mace based character, I've noticed the proc "Crushed Bones" when hitting a monster with mace skill at level 3.

On the wiki for mace skill there is no mention of this proc.

While there is a page on crushed bones, I don't see that skill in any of my skills.

I am currently at skils:

• Macery 4 (though I saw it at 3 skill 3)
• Bezerker Rage 1
• Flash-shaping 1
• Mathematigic 1
• Magic Training 1
• Smithing 3
• Emomancy 1

(Its a pure random skill set)

Am I just seeing things? or am not seeing something obvious? or is the wiki lacking (I'd rather not be editing the wiki based on my suppositions alone)?

Answer 1

According to master game file (skillDB.xml), Crushed Bones debuff has 8% chances to occur on target hit starting from the skill Mace Rehearsal (level 3 of mace skill).

Maybe it has been added in a patch or in an extension, explaining the outdated wiki page