Darth Grizzlon

Darth Grizzlon was the Sith Apprentice of Darth Hatrex and a member of the Sunbear species who were bears that could talk and lived in suns. To live in suns and not be dead sunbears had to be immune to heat which had the extra affect of making them immune to lightsabers, as anyone with a lightsaber found to their woe upon finding one.