From publisher blurb: In the darkness beware of the lights. Salamanders preparing an ambush for unsuspecting travelers. Drow outpost attacked by monsters. An aboleth plotting in the lake deep underground. The creatures of the Underearth lurk in the corridors to drag heroes into the darkness. This encounter pack contains 10 carefully designed encounters, with monster tactics, leads, hooks, and new monsters and items to spice up your game. Easy to use and drop into any adventure–to fill up blanks on the map, make a long journey more interesting or kickstart another adventure. The dark corridors of the Underearth await!