Loki
Loki was a mischievous Norse god.
Loki - Norse Trickster God
Loki was the Norse trickster god and a bundle of contradictions.
Loki Bets His Own Head
The story of the bet Loki made on his own head.
Trickster Gods
Loki was the Norse trickster god. There were many other trickster gods than can be found in the world's mythologies. Here is a list from Wikipedia.
Norse Gods
Background information on Norse mythology.