Slay the Prison Warden

If Oldur, The Prison Warden has not yet been encountered, you can accept this quest by placing
him from the encounter deck onto the staging
area. The quest is completed when Oldur has
been slain. If Oldur was already killed, you can complete this quest by exhausting one character. Completing this quest cripples the Dungeon's defences, granting the adventurerers 3 progress
points.
"Do not face the warden unless you have an army or
a deathwish.."