Black Spaw Den was one of three leveling dungeons introduced in the June 2000 patch. (The others being Olthoi Horde Nest and Lugian Citadel). A leveling dungeon is a dungeon with a large number of relatively easy to kill, often non magic, creatures worth good experience, on a fast spawn cycle. The Black Spawn Dens were popular leveling areas until supplanted by the Marae Lassel Olthoi dungeons in the Oct 2001 Dark Majesty expansion and finally the Aphus Lassel Tusker Dungeons in Nov 2002.
There are 3 locations. One on the Obsidian Plains 60S, 57.7W, one near Ayan Baqur 56.6S, 86W, and the other near Teth 13.6N, 79.8W.
Initially on a very fast spawn, the spawn rate was nerfed in July 2000. The portal entry requires level 20 or greater. Entry is neither a safe nor hot drop. Tuskers can and do get into the first room, epsecially if dragged into the room by other players. The first area is comprised of Tusker Slaves. As you go back the dungeon divides into a right and left area with the left area being the larger of the two. About half way into the dungeon Tusker Guards appear. In the right area is a virindi puppet in the last room.