Slayers Premium

Slayers Premium (スレイヤーズぷれみあむ) is a 2001 Japanese anime short film written and directed by Junichi Satō. Premium, the fifth and latest Slayers film, was first released in Japan on December 22, 2001, along with Sakura Wars: The Movie, DiGi Charat and Azumanga Daioh: The Very Short Movie.

This is the only Slayers movie so far to feature the characters of Lina Inverse, Gourry Gabriev, Amelia Wil Tesla Seyruun, Zelgadis Greywords and Xellos. Naga the Serpent also has a small role, as "the octopus sorceress". However, as is the tradition with all of the anime movies and series published thus far, Naga does not actually meet or interact with any of the other main characters.

Plot
In this movie, Lina and Gourry travel to the town of Acassi, known for its tasty octopus. However, the octopus meat is cursed, causing the person who eats it to only be able to speak takogo (タコ語, octopus language). Sorcerers and sorceresses cursed by this also cannot cast spells, since the spells have to be spoken in a common language in order for them to work.

Gourry just happens to eat one of the cursed octopi (after fighting for it with Lina), which causes him to speak in takogo. This often creates awkward situations during the film (the phrase "How horrible" being spoken as "Flat Chested", which offends Lina greatly). But soon, everyone in town starts to speak takogo (including Amelia and Zelgadis, who had just arrived in town), despite the fact that they haven't eaten any octopus. Xellos is also there, seeming to know some details about what is going on but isn't divulging anything.

It soon becomes evident that the octopi plan to use the accumulated anger from the villagers of Acassi to release a demon that was sealed many years before. Lina and her friends have to stop these plans before they come to fruition. However, it becomes complicated when Lina is infected with the takogo affliction, which negates much of her magic, including the Dragon Slave, her signature move.