Got a... Fairly interesting run going on right now. Things were kinda humdrum to begin with, but then I got a lightning spell and the lightning modifier along with electric immunity, and I thought "okay, yeah, this can get me places".
And then things got crazy. The juncture before the Hiisi base had sea of acid for sale, which meant that with a bit of juggling I managed to crack the bottom open (and piss off the skeleton, who died to electric fury) and thereby bypass the "no editing anymore" trigger, so I had a base I could return to for the stripping and reconfiguring of wands.
And boy, what wands I found... Managed to find an always-homing wand that I slapped a lightning-modded death cross on for a poor man's game-ender, some more acid spells, and the black hole projectile... Along with a speed mod, which is enough to make a single black hole charge punch through the brickwork between the top of the holy mountain shop and the previous level. With that, I successfully connected the Hiisi base with the snowy caverns, thereby technically opening up a route all the way back up to the surface.
Now I've got a couple mist spells, the acid trail mod, and an overloaded wand that's configured to fire a blast of 8 double-range extra-blasty lightning bolts, and right before I saved the game (it's getting a bit late), I found a wand with a couple freeze mods on it... Which will go very nicely with the tentacle spell I found.
Other perks include personal shield and melee immunity (plus saving grace, which I guess is alright since I found a few healing spells), so I'm actually doing fairly well for myself. Still haven't got a proper be-all end-all wand (the ultra-lightning BFW is awesome alpha strike damage, but it has to be used EXTREMELY FUCKING CAREFULLY and it's got some serious recharge/recoil on it), but I'm pulling together all sorts of parts now so it shouldn't be long.
Got all sorts of utility wands though... Digging wand, mist+acid trail for reusable acid rain, healing, passage-making black hole (I'm curious to see how much ground I can cover by doubling up speed mod with the slithering mod, might be enough for a single charge to clear through an entire holy mountain).
Oh yeah, and I've passed by a couple lava-to-blood mods on the way down here. Maybe I'll make it down to Hell and see what that's like!
EDIT: So the game just crashed (luckily only losing a few hours of work, and not the whole run), and I have learned many things.
First off, for the love of all that is holy do NOT go into the desert chasm without a teleport or at least some form of digging/supersonic propulsion. Good grief that was a nightmare going down, and even worse coming back up again!
Second, Tentafreeze (freeze mod on tentacle) will indeed gib everything in the game except for certain bosses. It does appear to one-shot the dragon wyrm, but the secret spider boss took like 5-6 hits before going down. I then put together a teleport wand with both +speed and slithering, and the projectile does move slightly faster with both mods... Unfortunately, this appears to be just fast enough that if you hit the right angle, the projectile will travel too far offscreen and just despawn without teleporting you.
Third, with my new super-teleport in hand, I visited the sky. Tentafreeze kills the sky enemies in one hit, too. That includes the sky worms and the beef cubes with their ridiculous resilience.
Fourth, fuck clouds.