The Second Darkness Adventure Path comes to its explosive conclusionas the heroes travel into a forgotten world hidden deep underground -- theLand of Black Blood! There, they must contend with the region's monstrousguardians and defeat the drow who would use ancient magic to call down a starfrom the sky to destroy their enemies on the world above. This volume of Pathfinder also includes a gazetteer of the deadlyLand of Black Blood, an exploration of the demon lords of Golarion, a bonusadventure set in the deepest reaches of the underground world, and several newmonsters from these dark depths.