PSA: When soloing Deep Dungeon.
On the 11-20 stretch beware an enemy called Palace Slime, they use an attack called Rupture that is instant with no telegraph and no warning and will hit you even if you're kiting. Made solo impossible on any setup where I had to fight one, it's rather irritating. The move needs a cast time and a telegraph or just a telegraph.
First time it exploded about 5 seconds after pulling it and one shot me, second time around I was kiting it and despite being well out of melee range it still one shot me, any subsequent runs I just avoided them. I was a level 23 paladin at the time with around 800 hp, the move hits for 1600-1800. All other times after I just bypassed them entirely rather than fight them even if it meant skipping a chest.