The Igloo started out as a perfectly normal hut made of ice, that was until a gamma-irradiated polar bear urinated on it. Somehow, the polar bear pee gave the Igloo sentience and powers far beyond those of normal Eskimo housing. Not surprisingly, this brought Wolverine running from the bar he'd been getting plastered in and straight into conflict with the aspiring super being. During the melee, Wolverine accidentally disembowelled the Eskimo family that created The Igloo. As the life blood of his beloved family poured into the snow, the Igloo vowed vengeance upon his hated enemy. This of course was completely forgotten once Wolvie hit the big time in the X-men.