Terabyte672 | Final Fantasy VI Advance: Boss 39 - Wrexsoul @Terabyte672 | Uploaded August 2008 | Updated October 2024, 4 hours ago.
You need to defeat this boss to complete Cyan's dream sequence and obtain the Alexander magicite.

First, KO and revive each character. Eventually, Wrexsoul will return to the battlefield. Then, spam Blizzaga until he dies or possesses someone else. If the latter occurs, repeat the process.