Sages will aver that the denizens of the underworld are, by necessity, alien to surface dwellers such as ourselves. Few will ever stand on the ink-black shores of Lost Agharta, and even fewer will return to tell the tale. Those that do report creatures transmuted by their deadly environs and the weird gloom. These creatures of legend owe no allegiance or kinship to the beasts of our lit-realms, and woe to the adventurer who mistakes them for familiar foes. Collected herein are thirteen of the stranger beings explorers may encounter upon their arrival at the very center of our hollow globe. This is certainly not an exhaustive list, if such a thing could even exist – for the underworld is vast, and our knowledge is slight.