First king of Atlantis
Their royal family connection explains Kordax's claim to ancient Atlantean power.
Orm learns that Kordax was the brother of King Atlan.
Arthur's blood connects him to Atlan's royal lineage.
The plot explains that the blood of any descendant of Atlan could release Kordax, and Arthur's blood is used in the release.
Orm is connected to the ancient royal succession surrounding Kordax.
Orm is an Atlantean royal and learns that Kordax's prison can be opened by the blood of Atlan's descendants.
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Related entry on Wikidata (Q59913640), public domain (CC0).