Ervelt is a mid-sized island in the southern waters, not far from Quba. While it has no real towns to speak of, it is inhabited by a tribe of humans called the Hirsin, who collect and make Sun Silk. The island is mostly jungle, but there is evidence that the jungle has been cleared in the distant past, either by natural means such as fire or by woodcutting. A jagged mountain range lines the north-western edge of the island.
Odd metallic ruins and the remains of villages suggest this island used to be much more populous, but age suggests this was likely several hundred years ago, if not thousands. The island currently has an overly large spider population (worshiped by the Hirsin), and there seems to be a decent presence of elementally-enhanced animals (such as shocker lizards).
The Resistance on Hesta is convinced that a pocket of elemental darkness exists on this island, and has tasked the party to search it for elemental onyx, which the Resistance can use to create amulets that block the Fey tracking spells.