Magic Knight Rayearth 2Magic Knight Rayearth II - CLAMP

Hikaru, Fuu, and Umi are once again transported to Cephiro. But, with the Pillar gone, they don't know how they could have been transported back. As they meet up with old friends, they find that Cephiro is now crumbling because they do not have a pillar. They also find that gates from other worlds have opened, and the leaders want the Pillar to themselves for their own selfish reasons. Hikaru, Umi, and Fuu must now set out to save Cephiro form dying.

(Source: ANN)

Magic Knight Rayearth 2 was first published in English by Tokyopop from June 2000 to June 2003, as volumes 4-6 of Magic Knight Rayearth. Tokyopop rereleased the series in an unflipped version, first as a collector's edition box set on April 25, 2003, and as individual volumes from February 8, 2004 to June 8, 2004. Dark Horse later took over the license, and published the series in omnibus format on April 11, 2012, and later digitally on August 13, 2014.