User blog comment:Xilinoc/Ch. 600 - SNIPE/@comment-5693502-20141008195917/@comment-5693502-20141008213039

I'd like to know how Yama-jii ranked compared to the Royal Guard members in terms of combat ability. You'd assume the Royal Guard members could achieve similar story-breaking effects with their zanpakutō (if you also assume that they have spiritual power that is similar in volume/strength to Yama-jii's). Well I just hope that Nimaiya's zanpakutō is either:
 * melee-type with some unique, story-breaking sub-power/technique
 * or a blade with an outright overpowered ability

And yeah I don't think zanpakutō rust either, but each to their own opinions.