Amphiaraus

When that befell, the Argives turned to flee. And as many fell, Eteocles and Polynices, by the resolution of both armies, fought a single combat for the kingdom, and slew each other. In another fierce battle the sons of Astacus did doughty deeds; for Ismarus slew Hippomedon, Leades slew Eteoclus, and Amphidicus slew Parthenopaeus. But Euripides says that Parthenopaeus was slain by Periclymenus, son of Poseidon. And Melanippus, the remaining one of the sons of Astacus, wounded Tydeus in the belly. As he lay half dead, Athena brought a medicine which she had begged of Zeus, and by which she intended to make him immortal. But Amphiaraus hated Tydeus for thwarting him by persuading the Argives to march to Thebes; so when he perceived the intention of the goddess he cut off the head of Melanippus and gave it to Tydeus, who, wounded though he was, had killed him. And Tydeus split open the head and gulped up the brains. But when Athena saw that, in disgust she grudged and withheld the intended benefit. Amphiaraus fled beside the river Ismenus, and before Periclymenus could wound him in the back, Zeus cleft the earth by throwing a thunderbolt, and Amphiaraus vanished with his chariot and his charioteer Baton, or, as some say, Elato; and Zeus made him immortal. Adrastus alone was saved by his horse Arion. That horse Poseidon begot on Demeter, when in the likeness of a Fury she consorted with him.


- Pseudo-Apollodorus, The Library, Book 3, Chapter 6, Section 8