Other Side

De Other Side (also spelled as Da Other Side and The Other Side) is Bwonsamdi's pocket dimension in the Shadowlands. It's a dungeon in World of Warcraft: Shadowlands. Though it is a realm of its own, it has a physical entrance in Ardenweald.

Bwonsamdi brings the spirits of any who worship him into his realm. The realm of death is his alone and Bwonsamdi guards spirits well, if a life ends and Bwonsamdi is that someone's friend, then that spirit Bwonsamdi will surely guide, "Come on through to de other side."

Brokers are not permitted to visit and are generally not accepted as trade partners according to members of Cartel Ta, but Bwonsamdi has made at least one exception.

Adventure Guide
''Bwonsamdi has kept a secret place in the Shadowlands he refers to as De Other Side. When the dead started funneling into the Maw, Bwonsamdi hid several in his little domain, keeping his troll followers safe. But this broke an old deal with Mueh'zala and now the ancient loa has come to harvest those souls and destroy their caretaker. Bwonsamdi will need help collecting on some of his other dealings if he is to survive this onslaught and protect the souls within.''

Wrath of the Lich King
During Zalazane's Fall, Vol'jin called Bwonsamdi from the Other Side.

Battle for Azeroth
Spirits of Bwonsamdi's faithful flock to his temple in Nazmir where they come to enter Bwonsamdi's realm of the Other Side. A large number of blood troll souls have been sent to the Other Side for Bwonsamdi by a Horde champion. Kel'vax Deathwalker's soul was sent to the Other Side by his parents to be judged by Bwonsamdi for his betrayal.

In Zuldazar Gurubashi spirits that are released in Tal'gurub go to the Other Side. Rastakhan's soul is restored to his body from the Other Side.

Shadowlands
Mueh'zala is in the Other Side, which is able to connect to locations such as Ardenweald, Mechagon, and Zul'Gurub.

Speculation

 * The version of Zul'Gurub accessed through Bwonsamdi's portal within the Other Side may actually be another dimension than reality given the odd landscape and the fact that Hakkar mentions he "will live again", implying he is not fully resurrected. It could be the Emerald Dream, or a result of the Other Side bleeding into Zul'Gurub, or a part of the Other Side entirely, or Hakkar's own pocket realm similar to the one entered during the Jin'do encounter.