Lost Master Arc
The Lost Master Arc is the 2nd Phase of the Kingdom Hearts series, beginning from Kingdom Hearts IV[1].
Chronologically, it is preceded by the χ series and the Dark Seeker Saga.
Overview
Defeat of Master Xehanort
- "Sora, listen. The power of waking isn't to go chase hearts around! Even if you do locate Kairi, you might never come home to us again."
- —Mickey warning Sora not to abuse the power of waking.
Following the defeat of Master Xehanort and the Real Organization XIII, Sora resolves to find the heart of Kairi, who was struck down by Xehanort in order to forge the χ-blade moments before the final battle. Despite misgivings from King Mickey, since Sora previously failed his Mark of Mastery exam, Sora successfully manages to locate and restore Kairi, though his own heart is lost in the process and he fades away. Sora's friends later try various methods to locate him, but all are unsuccessful until the Fairy Godmother intervenes and suggests that they use the dreams of Kairi and a Nameless Star. Kairi is confronted in her dreams by an illusion of Xehanort, who mentions a world "on the other side", which the Nameless Star goes on to identify as a world named Quadratum. Using the power of waking, Riku opens a portal to Quadratum to search for Sora. Meanwhile, in Quadratum, Sora is accosted by a young man named Yozora, who he narrowly defeats.
