User blog comment:ImperiexSeed/The oldest being, archangel or leviathan?/@comment-2059966-20111002132408

Isn't the Colt supposed to be able to kill everything except for 5 creatures. As there are 100's of Leviathans they can't be part of those 5 immune to the Colt. Plus last I saw the Winchesters had the Colt. So why don't they use it? Unless the writers just wanna make it harder and more interesting for this season...