Marvel Girl's body cut off the skirt, Electra's hair. Put a skirt back on from a Mcfarlane Girl Viking figure. Shoulder pads, Arm and leg armor and the top of the shield and Helmet are all made from Toy Biz Iron Man stuff. A litle bit of paint and there you go. Comments and suggestions welcomed, please look at my other work too.
Thanks
Lee

Sif was born a second generation goddess of Asgard, her parentage unrevealed. As a child, she had golden hair and was an occasional playmate of Thor and his half-brother Loki. Once, while she was still an adolescent, Loki decided to play a trick on her in retaliation for her preference of Thor's company over his. As she slept, Loki cut off all of her golden hair. When she discovered the misdeed, Sif alarmed the entire capital city of Asgard with her cries of dismay.

Loki, knowing he would be blamed for the trick, hurried to the kingdom of the Trolls to bargain with them to forge some artificial hair of pure gold to give Sif as recompense. The Trolls agreed to his terms and set about making the hair, secretly preparing it in the event that Loki tried to renege on his side of the bargain. Loki indeed stole the hair without paying for it, and presented it to Sif. Placed on her head, the gold hair began to grow as if it were natural, shinier than before. However, because the Trolls did not have a chance to treat it with a special potion before Loki stole it, the hair began to darken, finally becoming ebony black.