Loki was . Using his cunning and devious ways. Lol how is he useless? He essentially not only ruled a planet (realm), but THE planet, Asgard. Let me know when Zod, Bane, or Joker rule a planet in any way shape or form.
Out of all of the villains seen on film, Loki is definitely the most accomplished. And he didn't even use brawn to do it.
@wolverine08: Me too
Talia and bane >>>> loki.
Also King of Asgard? Where are you getting this from. Odin was the king of asgard. Thor was banish by Odin, then Odin went into "Odin Sleep". leaving Loki being temporary leader since he was his son (adopted, but still his son). he wasn't the king since Odin still lived and he was recognized as such. the only trickery he did was keeping thor banish which he failed at. and also killing the frost giants leader.