Though first recorded fairly early by the Guvners, the Steaming Fen — the 14th layer of the Abyss — is far off the beaten trail, avoided even by the tanar'ri (out of superstition largely more than anything). This is because it was here that the tanar'ri were once kept low, here that once held power over the whole of the Abyss. It is the Steaming Fen where the Queen of Chaos holds court, and though she's well-weakened since the days of the War Between Law and Chaos, she still survives even today with hundreds of her spawn, the spyder-fiends.