There isn't much dungeon-y stuff that you can put in Minecraft. I'd say that you should use Redstone Torches as the primary light source. Beyond that, I can't help much.
get the snapshot and use tripwires in dark rooms connected to dispensers that spawn cave spiders.
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I'm going to mash signature stuff together: I tested 100% positive for MC addiction, I'm a black knight, support crappy trees, my color is red, and microsoft destroys to a cactus.
Sticky piston traps that drop the player into lava or pour gravel on their heads.
Lots of dark side rooms for mobs to flood out of.
Crushing piston doorways.
Secret passages.
Troll chests (filled with useless items).
Signs with unintelligible text.
Dark areas with deep pits players can fall into.
Dispensers that shoot arrows/potions at the player.
Cacti pits.
Cobwebs + soulsand + cave spider spawners = not much fun in Stalingrad.
Sticky piston traps that drop the player into lava or pour gravel on their heads.
Lots of dark side rooms for mobs to flood out of.
Crushing piston doorways.
Secret passages.
Troll chests (filled with useless items).
Signs with unintelligible text.
Dark areas with deep pits players can fall into.
Dispensers that shoot arrows/potions at the player.
Cacti pits.
Cobwebs + soulsand + cave spider spawners = not much fun in Stalingrad.
XD
Lots of dark side rooms for mobs to flood out of.
Crushing piston doorways.
Secret passages.
Troll chests (filled with useless items).
Signs with unintelligible text.
Dark areas with deep pits players can fall into.
Dispensers that shoot arrows/potions at the player.
Cacti pits.
Cobwebs + soulsand + cave spider spawners = not much fun in Stalingrad.