A manga sequel, MÄR Omega, written by Anzai and illustrated by Kōichirō Hoshino, was published in Weekly Shōnen Sunday from September 2006 to June 2007, with its chapters collected in four tankōbon volumes.

Upon meeting a mysterious 16-year-old witch named Dorothy, Ginta is introduced to the powerful magical accessories and weapons called "ÄRMs".

Dorothy plans to steal the mysterious ÄRM Babbo, from a trap-guarded cave, and brings Ginta along to assist her, intrigued by his unusual strength and abilities.

Alviss reveals that he summoned Ginta in order to gain assistance from an "other-worlder" in the upcoming war, as was done previously, and that Babbo originally belonged to one of the knights of the Chess Pieces.

Gaining both allies and enemies, the series follows Ginta as he opposes the Chess Pieces, led by King Orb, Queen Diana and her servant Phantom.

Upon returning, Kai discovers that the Fake ÄRM users are possessed and want to take Babbo to bring him to a sinister mysterious figure who was watching them the whole time.

The Grand Elder tells them that over 300 years ago the Fake ÄRMs were created by a dark magician, Unwetter, who experimented with the human mind manipulation.

Babbo, the Elder of Caldia at the time, defeated him, consigning him and his malicious creations into oblivion, just before dying, transferring his soul into the ÄRM and erasing every memory related to the incident.

Kai, alongside Inga and Elise go on a journey to find Babbo's magic stones, which would restore his memories of the Grand Elder who fought the Fake ÄRMs and Unwetter 300 years ago, and save MÄR Heaven.

[8][9] A sequel titled MÄR Omega, written by Anzai but illustrated by Kōichirō Hoshino, was published in Weekly Shōnen Sunday from August 30, 2006,[c] to June 13, 2007.

[15] An anime television series adaptation titled MÄR Heaven (メルヘヴン, Meru Hevun), produced by SynergySP, premiered on TV Tokyo on April 3, 2005, where it ran for 102 episodes until its conclusion on March 25, 2007.