Demons in the Library
Somewhere, in a long-forgotten dungeon or deep in the heart of an abandoned keep or some other ruin, lies a mages' library. This library, guarded by magically bound demons, contains valuable books, thousands in number, historical and otherwise, both magical and mundane. Getting inside is easy; getting out alive is the problem.
Encounter level 5 (9,900 XP + 200 bonus for optional skill challenge + variable bonus for active skill rolls)
1 bloodseep demon (B)
2 maw demons (M)
1 summoning circle trap (7 rupture demons)
1 optional mini skill challenge
I pulled this encounter from a recent campaign I ran my son through. He really enjoyed it, and I think others will, too. The Demons in the Library encounter can be inserted into any campaign you are running, just be sure to do two things. One, place the location deep inside a building or dungeon or some other place the PCs are exploring and two, make sure there’s another way out of the room leading into it because the library itself is a dead end.