The hell with the monsters that do not play by the same rules as me, that's really annoying.
Found
SnorgOk, monster spells are always more powerfull and last more than the player version for some insane reason.
That i got sadly used to it.
But in the case of Snorg what i really disliked is that once Snorg went out of Berserk after a while but unlike you it is not affected by Slow, and unlike you he can relaunch Berserk immediately.
Snorg killed several minor demons, their summons and even 2 greater demons because of this immediate relaunch of Berserk, and despite i paralysed him 2 times he got out of each paralysis after only 1 turn so i could not even run away.
And to add more of annoying random number fun, as i was out of the faith rank that allow me to call for more greater demons, i used a few "summon shadow" to try to get some meat shield between me and him and despite it was Dungeon:14 summoned a few snakes, a bat, 2 kobolds and a rat.
Great, let's say that berserked Snorg killed them all in a turn or two due to his speed and damages, and laughed at my 2 blinking scroll usage as despite i teleported a screen away each time, the next turn he was always there in contact, talk about insane speed.
There are times in which the Crawl code seems to really wants to kill your so far very interesting and good character, and it always manage to do it.
edit : found again the strange hellish big room with an island surrounded by lava and a lots of demon on it.
This time helped by a few greater demons and minor demons, i cleaned that room, and it was a Hell portal in the center.
A few nice weapons , though only magical, not artifact, could be found on the ground.
(the walls around lava are not walls, that's just a bug of NetTiles, these are smokes and clouds)