Where to Find a Large Snake?

[Silfir]

That's true, except the thematic ones seem to be the norm to me, too. Starts with undead and rats all the way to the giants and deserted shops. Mixed tension rooms aren't as common as the others.

[SirTheta]

afaik, there is no tension room with only one type of monster. those are threat rooms.

[ghostrobotmoonzombie]

"you sense a certain tension"

most often for me these are similar creatures, eg: orcs, large orcs and a chieftan. or skeletons, zombies and a ghul. or gnolls, large gnolls and a chieftan. or giants, ettins and a frosty.

i get these much more often than the mixed tension rooms.

[Al-Khwarizmi]

Yes, fortunately thematic tension rooms are more frequent than random ones. Random ones are typically rather dangerous in the early game, the tension rooms of rats or hobgoblins that you get at that stage, not so much.