Tauren Druid Irenic of the Mal'Ganis server leveled up to 90 in World of Warcraft without ever killing a single enemy.
"Since the entrance to Pandaria isn't designed to be entered without questing and killing I spent all my time doing archaeology, and gathering in Kalimdor," Irenic said of his strategy for the last five levels.
Over the 12 days, four hours, and 33 seconds played, Irenic has done a total of 92 damage and completed one quest, which is auto-flagged as complete for all factions. His stats rate him at zero kills. His initial strategy to reach level 85 can be found in a different thread.