I think The Legend of Acrius is about Acrisius. Who was a king of Agros.
Death-
Disappointed by his lack of luck in having a son, Acrisius consults the Oracle at Delphi, who warns him that he will one day be killed by his daughter Danaë's son. Danaë is childless and to keep her so, he imprisons her in a bronze chamber open to the sky in the courtyard of his palace. Zeus impregnates her in the form of a golden shower (some accounts say it is her uncle, Proetus, who impregnates her). Danaë becomes pregnant with Perseus. Acrisius puts the child and Danaë in a chest and throws it into the sea. Zeus asks Poseidon to calm the water; he does and Danaë and Perseus survive, washing up on the island of Seriphos. A fisherman named Dictys, brother of King Polydectes, finds the pair and takes care of them.
Perseus grows up to be a hero, killing Medusa and rescuing Andromeda. Perseus and Danaë return to Argos with Andromeda, but King Acrisius has gone to Larissa. When Perseus arrives in Larissa, he participates in funeral games and accidentally strikes Acrisius on the head with a discus, killing him and fulfilling the prophecy.
I’d imagine Acrius is Arc because of the parts dealing with Zeus.
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There’s also the implications of a connection with Icarus. That Tyra Karn speaks about in the lore tab.