Magic Knight Rayearth Omnibus Volume Two collects volumes four through six of CLAMP’s manga series into one volume. Dark Horse Manga has the North American distribution rights for the series, and this omnibus edition was released in 2012. There isn’t a rating published anywhere for this volume; I would recommend Magic Knight Rayearth to manga readers who are 13 years of age and older.
This volume opens with Hikaru, Fuu, and Umi (the three Magic Knights) thinking of the land of Cefiro and what happened at the end of the first volume. The three girls gather at Tokyo Tower, from where they wish to return to Cefiro.
The bright light that took them to Cefiro in the first volume appears, and the three return. Clef the guru is surprised by their arrival, because only the pillar is supposed to be able to summon the Magic Knights; since the pillar is now dead, no one knows how the girls returned.
The Cefiro they return to is a world that is now falling apart, since there is no longer a pillar to protect the land. Worlds outside of Cefiro can now access the land. Hikaru, Fuu, and Umi take on their role as Magic Knights again, and declare that they will do what they can to help Cefiro. Lantis, the younger brother of Zagato, has returned to Cefiro. Hikaru finds herself falling for Lantis, which adds another layer to the story.
There are three worlds trying to invade Cefiro for different reasons. Eagle Vision, Geo Metro, and Zaz Torque are from the world of Autozam. The environment in their world is being destroyed, so they want to seize the pillar system and return with it to Autozam. Lady Aska is a spoiled ruler from Fahren, and she wants to become the princess and to fill the world with candy. Tata and Tatra are from the world of Cizeta, and they want to expand their territory.