These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: Full Metal Daemon Muramasa
Anticlimax Boss: Despite his appearence and the fact that he's particularly a Physical God, the entire confrontation between Kageaki / Muramasa and Majin Ukyo is pretty much the most anticlimatic "fight" in the entire story. That might as well have been the point since it happens directly before the final battle between Kageaki and Hikaru.