ELDRICHT pirates

Raiders from another dimension, ELDRICHT pirates as they are colloquially called. (Their species name is unknown) Despite their humanoid form, they may have tentacles, horns or glowing skin. They travel through the fabric of dimensions with their airships, but no one knows how. At least based on their technology. They never trade, they only plunder. Their exact place of origin is unknown, they travel through a dimensional gate they created, no one knows how. They never stay long and they do not come in droves, always with just one or two Airships. They only come by airship. They are fast, unpredictable and cruel. They never show mercy. Their exact goals are unknown. It seems that plundering makes them live. In all the battles, if they are defeated, none of them survive the fighting, and none of them have ever been captured alive. Dangerous enemies. As quickly as they come, they leave just as quickly. They are the only ones capable of dimensional travel, it is not known how they do it, but apparently their technology has nothing to do with it. Even if someone manages to capture an ELDRICHT airship intact, they will still not be able to dimensional travel. There is no single representative of the ELDRICHT race in the known world