 An Oneiros is summoned by Zeus, and ordered to go to the camp of the Greeks at Troy and deliver a message from Zeus urging him to battle.The Oneiros goes quickly to Agamemnon's tent, and finding him asleep, stands above Agamemnon's head, and taking the shape of Nestor, a trusted counselor to Agamemnon, The Oneiros speaks to Agamenon, as Zeus had instructed him.The "Odyssey" locates a "land of dreams" past the streams of Oceanus, close to Asphodel Meadows, where the spirits of the dead reside.