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How to unlock the Black Coast "Tethys Underground Island" teleport (Data Stream right island)
While exploring the depths of Thetys, you may discover a teleport to a remote island on the map.
However, you can't swim there due to lack of stamina, and there's no way out in the data stream.
The way to get to the Thetys underground island isSurf from the island near the Blooming Zoneand you can get there easily!
