We're getting near the end of Athena on the NES now, but it's going to be rough going from this point onward: I've only seen the World of Hell once before this playthrough. I'm starting with the Ball and Chain, so it's the same old story of trying to avoid Pyutans and the Blue Swords they drop.
I look to the Internets, and it seems that Mado is completely immune to all forms of damage if you don't have Pandora's Box, which drops from the Boss of the World of Ice. Well, that's no problem, because I have... I have... oh World of HELL.
When I dropped down to the lower level and died without a K Slate, I lost all my gear and equipment, which means I also lost Pandora's Box. Worse: there's no way to get it back, since it's impossible to return to the World of Ice to get it again. Through the magic of modern Time Distortion technology, though, I can restart from the beginning of the World of Hell, complete with Pandora's Box. So let's!