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Level 80 Elite Tauren Chieftain, or L80ETC for short, is a tauren marine.
L80ETC used to defeat the Lich King once a week until he took on a trans-dimensional murloc puddle-jumper. In a flash of magic, a vortex was opened that transported the tauren across space-time into the Koprulu Sector. He apparently set himself as a composer, and at least some of his music was banned from airing within the Terran Dominion. However, it still reached an audience—art/music critic Humbert H. found his music to be "brilliantly subversive" and labeled it as one of the "voices of a generation."
The Second Great WarEdit
As the zerg lay siege to Backwater Station, a Raynor's Raiders force approached L80ETC. He retreated into his outhouse and blasted off. His journey throughout the stars took him by the Hyperion, Avernus Station and a xel'naga worldship in the Sigma Quadrant.
L80ETC was in early builds of Heroes of the Storm. he had a thick skin and benefited from strength items. He had a short-ranged gauss rifle. In the current version of the game, he has been replaced by Elite Tauren Chieftain—effectively the same concept, but no longer a tauren marine.
There appears to be a degree of overlap between L80 ETC and Level 800 Elite Tauren Chieftain, both icons effectively being Easter eggs and both featuring tauren marines in terms of imagery. However, it seems that an in-universe difference does exist, as in the in-universe blurb for Revolution Overdrive: Songs of Liberty, a specific reference is made to L80ETC, not L800ETC.