Pastmaster

The Pastmaster was a villain that appeared in the cartoon series "SWAT Kats". He was an undead sorcerer from the Dark Ages who tried to conquer his home city, travelling through time using a mystic pocket-watch, and The Tome of Time, he was able to summon extinct or mythical creatures such as dinosaurs and dragons. Although the tome was destroyed in his first appearance, he sought to transport Megakat City back to the Middle Ages where he would become its ruler.