For 10 points, name this trickster god of Norse myth.
This god killed Fimafeng, a servant of the sea god Aegir. This god once turned into a female horse to prevent some walls from being finished on time. That resulted in him giving birth to Sleipnir, the eight-legged horse of Odin. His other offspring include the ruler of the underworld and a giant serpent that wraps around the world. This god talked Hodur into hurling a mistletoe at his brother Baldur, killing him. For 10 points, name this trickster god of Norse myth.
This god killed Fimafeng, a servant of the sea god Aegir. This god once turned into a female horse to prevent some walls from being finished on time.
Loki