Tartarus

 is a Tier 8+ Dungeon Adventuring Area accessible from The Rise, Savrenoc Stronghold, or using a Teleporter to Tartarus.

Trivia

 * This high level dungeon went into live testing in Release 66 with an unofficial release (no actual entrance) and then an entrance from The Rise dungeon was added in Release 67.
 * New levels were added in Release 70.
 * Release 71 added lots of new content including two wave battles, new bosses, and 5 new artifacts! Additionally a second entrance to the bottom level of the dungeon (that leads directly to the mines area) was added in the Savrenoc Stronghold scene.

Other Information
There are multiple wave battles inside of Tartarus.