| Category | Islands |
| Region | Necrocrypt |
| Location | Sea of Mourning |
| Climate | tropical |
| Map | Nithlurik |
The island of Urêthîn lies within the realm of Necrocrypt. Its fragmented terrain boasts numerous hot springs and steaming pools, the majority of which are toxic and sustained by geysers. The volcano that gave rise to this island collapsed centuries ago, causing it to crumble inward and form the Gizronâs channel, ultimately separating a landmass that became known as Urêthîn from the mainland.
The island is beset by the undead, akin to the other regions of Necrocrypt. Some lurk in the pools, poised to ambush any who dare approach. Certain of these undead are beyond necromantic control, and thus pose a menace to both travelers and the Black Tide's minions.
The largest settlement on the island of Urêthîn is the bustling port city of Mularûn. As with the other islands in this territory, this land falls under the dominion of the Black Tide of Thasmudyan.