Slygvorn the Grayskull (12/4/5634-1/12/5688) was a male gray rat, and the last true Emperor of the Kaiantoran Empire. He was a tall, lean creature, fond of Dawnish wine and thick plate armor, and ensured that strategy, levelheadedness, and the importance and beauty of the Empire and ratkind were instilled upon his litter. As is custom, second-born son Sligvere became heir after killing his firstborn brother and sister.

Slygvorn died during the last battle of the War that destroyed the Kaiantoran Empire, and never saw his Empire end.