Don Harding

Don Harding was one of the witches who brought Samhain to earth and was the brother of Tracy Davis.

Background
Like his sister, he was a very old witch, and was in fact Tracy's younger brother. He posed as a high school art teacher at the school Tracy went to. Sam and Dean visited him to talk about Tracy. Consequently, Don showed them her work. Soon after visiting him, Don placed Hexbags in their motel room. Sam and Dean found the hex bag ingredients in Don's desk after figuring out it was him. As Don was performing the ceremony and was about to sacrifice Tracy, Sam and Dean shoot him. That made him the final sacrifice needed to summon Samhain. Samhain used Don's corpse as his vessel.

Powers

 * Magic - Don was capable at magic, and could create Hex bags. He was also able to overpower his sibling Tracy, who was also a witch.
 * Immortality - Despite appearing in his early fourties, Don was over six hundred years old.

Appearances

 * Season 4
 * It's the Great Pumpkin, Sam Winchester

Triva

 * Don was the first Witch that Sam and Dean have specifically defeated by themselves.