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Continuing on from last time, and... a maze? This doesn't look right!
I didn't know that the Orb of Fate could levelport me to levels I hadn't visited yet. In this case I've managed to warp straight past Medusa's level. I want to kill her and search her level for loot, maybe some spellbooks. Spellbooks are like crack.
Detect treasure is something I've been wanting for a while. It saves me having to write it, too! A cursed potion of gain level will make me float through the ceiling to the previous dungeon level instead of granting me a level. Funny, but I prefer to uncurse and drink it because look at my experience requirements, damn.
I have a cursed ring of hunger in my inventory. I think I stupidly drop it later on, when I actually want to keep it - combining it with a ring of regeneration consumes nutrition extremely quickly, which is useful when eating corpses for intrinsics.
Heading up the stairs, we meet Medusa.
Being blindfolded prevents you from dying to her stoning gaze. And look, the lower right island - a spellbook!
A list of our spells. I need more levels so that I can reduce the fail rates on cancellation and turn undead. Also what's up with our defence, it's gone down from 12? 
I think I angered a god at some point.
Nurse dancing to gain more maximum health. I get about 20 health per nurse, which is excellent.
Eventually nurses will vanish. I got 32 maximum health from this nurse - incredible. If I reverse genocide (i.e. summon using cursed genocide scroll) nurses in a no-teleport area I could easily get several hundred hitpoints.
Silver dragon! I really want the scales off this creature because I can make the best armor in the game with it.
I found a spellbook of levitation. It sucks that I spent marker charges writing a copy of this, but that's the nature of the game.
Two things here: One, that spellbook on the lower right is gone 
Two, we're fighting a black dragon. These guys have a unique attack; disintegration. If you get hit with this, you die. We get hit with it. Luckily, reflection makes it not hit us. I dodged a bullet here, or more specifically, completely failed to dodge it. The only other source of disintegration is if you piss off a god. Black dragons shoot angry god rays at you.
Eating a black dragon gives the "You feel very firm." message, which is immunity to angry god rays 
Note that we are now Satiated; dragons weigh 4500 weight units, the heaviest thing in the game, which nobody can pick up at all ever. We're going to be full for a while - remember that Monty Python sketch where the guy eats a wafer and explodes? That's us right now.
Back down into the maze, I find a pair of... levitation boots. I was hoping they'd be water walking (still need that) but maybe I can polymorph it later. Wizards get polymorph.
FUCK NYMPHS. Nymphs steal your shit. Stealing my magic resistance cloak means I can't zap her with spells to kill her - I have to get up close. Could throw rocks I guess, but I didn't think of that. I don't need the cloak, honestly; Magicbane gives magic resistance, and so does the Eye I think. But it's the principle of the thing.
I use telepathy to track her down. My cloak now.
Next level down we reach the Castle! This is a no-teleport level, and if you look closely, you'll see there's no down stairs. The yellow is a throne, the yellow + is the drawbridge which we need to use the passcode to open, and the purple 4s are minotaurs.
In front of the drawbridge, I kill the moat-dwelling creatures. The eels can drown us and kill us in 2 turns, so I cast from a distance.
With those out of the way, it's time to open the drawbridge. Do you remember the passcode we got from praying?
Neither do I. I blow it up with force bolt and levitate over the water
There is so much shit to kill in the Castle I run out of power even with the Eye. With 195 health I'm not at any risk of dying, so I start laying into them with my dagger.
Eventually they're all dead, and I find a spellbook of knock. Knock unlocks doors, chests, etc. Don't really need it, and I don't use it, but it would save me from traps if I did.
A chest on a permanent Elbereth? The last time I saw one of those was the guaranteed amulet of reflection in Sokoban. I wonder what it could be? No I don't I know exactly what this is
Wand of wishing! I can wish for whatever item I want, such as...
Well, uh, nothing. I don't need anything. I can pray if I need spellbooks, I have a bag of holding, I already wished for the Orb of Fate, I'm beyond the need for a ring of slow digestion, I have almost all the intrinsics I need, I can write scrolls of genocide. What to get? I'll think on it.
I know these trap doors are here, so I levitate over them with the levitation spell. At rank Skilled and above, I can use the down key > to float back to the floor. The trap doors are what will get us to the floor below the castle.
More silver dragons! Hopefully one of them will drop their scales. I need those scales.
I don't get those scales 
I figure I may as well use the wand of wishing. I decide to go with a class artifact. They're the only things I can't get from a source outside wishing.
It takes two wishes - the odds of getting a wished-for artifact go down the more artifacts exist, and I am carrying at least three on me. Two wishes is less than I'd expect to use, and also less than I was willing to use due to utter lack of anything else I want. The Eyes of the Overworld are a pair of glasses which let me see through walls and can be invoked, like so:
Apparently I'm shock resistant. Thought I wasn't, but nice to know.
I recharge my wand of wishing. I'm not planning on using it, I just wanted to recharge it. There's actually an item called the helm of opposite alignment which I could have used to wish for some lawful and chaotic artifacts, but they're all garbage. I considered getting one that makes my magic missile do double damage, but that part of it only works for knights so I forgo wishing for it.
Heading down into the Valley of Death, rides the 600 spell wizard. That light radius we have is courtesy of the Eyes of the Overworld, which also lets us see through walls. Useful, because this specific level disallows magic mapping.
The Light spell in action. Extremely useful and I am very glad to have it. There's also a goddamn fuckton of undead here. Time to start blasting.
The corpse of a wizard past. Rest well noble soul 
All the way down at the bottom of the world, we finally find a spellbook of identify. Unlike the spellbook of levitation that I found shortly after writing the same, I don't feel at all bad about writing identify; it's seen me through the whole dungeon up to this point. And you know what? If this run takes longer than 50000 more turns, I'll be glad to have a spare.
Ah fuck I didn't see that spellbook at the bottom of the map! Also we're in an unaligned temple, dedicated to Moloch. We're in Gehennom, aka Hell, and we cannot pray to our god while we are down here. Any attempts to do so will get us immediately smited by Moloch. The only thing to do is not pray so that he doesn't notice us.
Then again, we're shock and disintegration resistant - I could murder his priest and take a shit on the altar and he wouldn't be able to do anything to me.
Next time, I'm gonna get me that spellbook.