Talk:Ur-Dragon/@comment-75.108.251.216-20130727164255/@comment-8923133-20130727200446

in theory its completely random, in practice people say if you fight it 10+ times and/or deal 1.2 millon damage you move into a better drop class, however this is probably just feeding off the message saying 'the more damage you do the better loot yo'll get' during the fight explaination and player's bias (being that you want it to be a certain way becuse you worked so hard at it, or something happens occationally, such as, headshots/crits give better loot drops).