An underwater sinkhole region off the eastern coast of Iqes in the Agreben Sea. The sinkholes descend into deep underwater caverns and passages.
Voidlock Passage
Deep within the Ederri sinkholes lies the collapsed, underwater Voidlock Passage — once a seagate leading to the underrealm of Zylogmus Eternus. The passage has collapsed but remains partially functional in a strange way: as you descend deeper and deeper into the flooded tunnels, the water becomes shared between the two locations, existing in both places simultaneously. This creates a dangerous phenomenon where currents from Zylogmus Eternus can pull swimmers into the underrealm without warning.