ThunderCats (comics) entered the Book of Omens to begin his training and claim his rightful place as Lord of the ThunderCats, but Mumm-Ra uses a powerful spell to keep Lion-O trapped in the book for several years in real time, not "Book" time, and seizes control of Thundera afterwards. In the follow-up mini-series, "The Return" (written by Gilmore and illustrated by Benes, Pimental and Lea), published in 2003, Lion-O returned to Thundera to find it enslaved to Mumm-Ra. Several of the ThunderCats are scattered. Panthro, who was left in charge while Lion-O was away, was forced into slave labor. Tygra and Cheetara
History of animation by Walter Ruttman, Hans Richter, and Oskar Fischinger, however, the Nazis censorship against so-called "degenerate art" prevented the abstract animation from developing after 1933. The earliest surviving animated feature film is the 1926 silhouette-animated "Adventures of Prince Achmed", which used colour-tinted film. It was directed by German Lotte Reiniger and French/Hungarian Berthold Bartosch. In 1923, a studio called Laugh-O-Grams went bankrupt and its owner, Walt Disney, opened a new studio in Los Angeles. Disney's first project was the "Alice Comedies" series, which featured a live action girl interacting with numerous cartoon characters. Disney's first notable breakthrough was 1928's "Steamboat Willie",