Party explores deep into the heart of an ancient ruin. They battle trolls, hordes of goblins and undead like abominations. Standing before an ancient door sealed with an ancient curse, fighting for their lives (and losing their barbarian oracle to a troll) they finally break the seal unleashing an ancient army of the legendary and lost dwarven race.
Continuing on the party encounters what look again like Dwarves, but grey skinned and foul tempered. The battle shows that these nasty grey skinned slavers can turn invisible at will and they control monsters (a bullete in this case) and use them effectively in combat.