Dungeon Crawl Classics #61:
Citadel of the Corruptor
An Adventure for Character Levels 7-9
In a world of arcane magic and divine might, some secrets are best left
hidden. When the forces of the wicked Mountain King discover an eldritch
weapon of unmatched power, the future of the Northlands hangs in the balance.
Following in the wake of bloody, madness-induced slaughter, can the heroes
prevail where an army has perished? Blood and madness are in store, for
where Lord Ablair the Corruptor passes, death must surely follow. Only
the most cunning and courageous of heroes can triumph against the Citadel
of the Corruptor!
“Citadel of the Corruptor is a solid upper-heroic tier adventure for Dungeons
& Dragons: Fourth Edition... I would recommend it to DMs looking for
an easy-to-run adventure, such as a one-shot game, DMs that have played
and enjoyed the earlier installments of this adventure path, or DMs without
a lot of time and with a macguffin in search of a home.”