Dr. Karla Sofen first became a criminal by manipulating the first Moonstone, Lloyd Bloch, into giving her his power source, an alien gem. She battled heroes such as Captain America and the Hulk before joining the Masters of Evil. She later rejoined Baron Zemo and others in the villains-disguised-as-heroes group, the Thunderbolts.
After acquiring a Spider-Woman figure, I was inspired to make Moonstone. The helmet was made from Spider-Man's head, with Spider-Woman's lower face attached, and rubber bungee for the 'fin', and plastic for the chinguard. The gloves are from Bucky, and the feet from Doc Ock. The belt and armbands are also made from bungee, and the chest-piece is from Giant-Man's belt. The eyepieces on the helmet are made from stick-on earrings, and finally the hair is from Emma Frost. Photos by Nara and myself. Thanks for looking, and, as always, Make Mine Marvel!