Key to Thundera
- Episode aired Sep 19, 1988
- TV-Y7
- 23m
While attempting to decode the Book of Omens Lion-O inadvertently traps himself within it. Mumm-Ra later steals the book, later becoming imprisoned in it himself.While attempting to decode the Book of Omens Lion-O inadvertently traps himself within it. Mumm-Ra later steals the book, later becoming imprisoned in it himself.While attempting to decode the Book of Omens Lion-O inadvertently traps himself within it. Mumm-Ra later steals the book, later becoming imprisoned in it himself.