Sjurgh is an extremely rare substance currently known to exist in its natural state only on Uljghersn. It is composed of Carbon, Hydrogen, at least a dozen minor elements, and an unknown elusive element hinted at only by the Skäetr. It has an enormous biological energy potential. One cubic nanopar is enough to fuel one of the Skäetr's massive Jgourmond freighters for an entire week.

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