Netherworld

The Netherworld is a location in the game reserved for holiday specific events. It can be found in the Sanctum right behind the Codex Plaque and to the left of the Endless Dungeon's entrance.

Bloody Valentine
The Bloody Valentine event lasted from February 13th to the 28th of 2014. The area consisted of a Dark alignment theme mixed with a Valentine Day vibe along side a Troll Boil in the middle. The Troll Boil consisted of 60 waves which once beaten allowed it's destruction which gave a substantial reward of souls.

Trivia

 * In the December TU, Signal Studios accidentally released the Netherworld only to undo their mistake quickly after.
 * At the beginning of the Bloody Valentine event. There were numerous reports of glitched caused freezing in the Netherworld.
 * The Netherworld has changed its appearance from the initial version, as it was Halloween themed originally.