The Eldritch Isle is a region in the Crystal IslesDLC. It is an island full of carnivores at the north-east of Crystal Isles. It is not recommended until you reach a high level. It is one of the best places in Crystal Isles to farm Aberration materials and Element Shards.
The island is really dark and it is nearly impossible to see without gamma commands.
It is possible to farm Element Shards from light blue crystals using Metal Hatchet (yes a hatchet, not a pick). Tek Stryders are unable to harvest those.
A high level Ankylosaurus tame can be brought there to farm Crystal Gems.
A high-damage Mantis wielding a high-quality Metal Hatchet is capable of harvesting more Element Shards per node than an Ankylosaurus. A Phoenix can also be used to harvest the nodes high up on the cliff walls, although they harvest less than a Mantis.
Going near the giant Crystals, or the water Bubbles that are scattered along the isle will occasionally electrocute the player.
Being electrocuted does not dismount winged creatures.
There is a bug where invisible water bubbles are possible with no content inside that dismounts unsuspecting flyers.
In some of the water bubbles you can find clams that contain black pearls.
Bring an Anglerfish to dramatically increase the yield of black pearls per clam.