The Lugalbanda Epics (the Hero in the Mountains)
Left for dead in the mountains, a young hero wins a storm-bird's gift — and runs faster than any army can march.
Also: Lugalbanda · Lugalbanda in the mountain cave · Lugalbanda and the Anzud bird · Anzud · Uruk hero · Aratta · Enmerkar's campaign
Lugalbanda is a hero of Uruk's legendary age, remembered in two Sumerian poems. In the first, marching with King Enmerkar's army against the distant city of Aratta, Lugalbanda falls gravely ill and is left behind in a mountain cave with provisions, where, through prayer and offerings to the gods, he recovers. In the second, alone in the wild, he wins the gratitude of the great Anzud bird by caring for its chick; in return the bird grants him a magical gift of speed and endurance. Lugalbanda then races back to the stalled army, crosses the mountains as a lone messenger to Uruk and back, and helps secure victory over Aratta. The poems blend the marvels of folktale — the storm-bird, the magical gift — with vivid pictures of illness, solitude, devotion, and courage. In later tradition Lugalbanda is counted a king of Uruk and linked to Gilgameš.
In short
Two linked Sumerian epics about Lugalbanda, a hero (and later legendary king) of Uruk who, falling sick and abandoned in the eastern mountains on a campaign against Aratta, survives by his piety, wins the favor of the Anzud bird, and gains the supernatural speed that lets him save Enmerkar's expedition.
Where it’s found
IN CORPUS (Sumerian, ETCSL): 'Lugalbanda in the mountain cave' (ETCSL 1.8.2.1) and 'Lugalbanda and the Anzud bird' (ETCSL 1.8.2.2).
How the idea developed across Sumer, Babylon & Assyria
Two Old Babylonian Sumerian compositions, sometimes called 'Lugalbanda in the Mountain Cave' and 'Lugalbanda and the Anzud Bird,' part of the Uruk heroic cycle (Enmerkar, Lugalbanda, Gilgameš). Lugalbanda appears in the Sumerian King List as a king of Uruk and in tradition as a forebear of Gilgameš; the figure is legendary.
Lugalbanda is a LEGENDARY/epic figure (a King List king of Uruk, known through poetry), not a documented historical person.