While Sora was visiting his incantation of Traverse Town for a second time; he comes across Neku and Shiki being attacked by the Dream Eater; Spellican. Spellican summoned a small army of Dream Eaters to attack the two. Just when Spellican attacked the two, Sora showed up and save Neku and Shiki. However, Spellican retreated to Riku's incarnation of Traverse Town.
When Spellican entered Riku's incarnation of Traverse Town, it processed to attack both Beat and Rhyme. Riku showed up and saved the two, but as a result the three get into an argument. This enraged Spellican because it felt it was being ignored. So Spellican summoned a small army of Dream Eaters to attack Riku, Beat and Rhyme, and then retreats. However, Riku pursued the Dream Eater. Spellican tried to stop Riku from pursuing it by summoning a small of Dream Eaters known as the Cera Terrors, but Riku manages to defeat them all. Before Riku can get a chance to attack Spellican, it retreats back into Sora's incarnation of Traverse Town.
As soon as Spellican enter Sora's incarnation of Traverse Town, it summoned as small army of minor Dream Eaters, as well as three different Dream Eaters that were prievously defeated to attack Sora; the Hockomonkey in it's mage form, the Wargoyle, and the Char Clawbster. Sora manages to defeat the three Dream Eater, but by the time he defeated them, Spellican retreated to another world; Symphony of Sorcery. As soon as Sora found out, he offered to traveled to the Symphony of Sorcery to keep their mission from failing.
Symphony of Sorcery
As soon as Spellican arrived at the Symphony of Sorcery, it cased a spell on Mickey to trap Mickey in an endless nightmare. As soon as Sora arrived, he eventually found Mickey, stuck in an endless nightmare. Mickey asks Sora to enter the world and find a Sound Idea, which was the only thing that was capable of cleansing the darkness plaguing the score.
In Riku's incarnation of the Symphony of Sorcery, Riku also encounter Mickey trapped in an endless nightmare, cursed by Spellican. Mickey asked Riku to find a Sound Idea, and that it'd be powerful enough to break the spell.
After Sora and Riku managed to bring the two Sound Ideas to Mickey, the two Sound Ideas form a harmony, and as a result, the dark barrier is purged. After the darkness was expelled, Sora then processed to enter the musical score to confront Spellican. After a long an strenuous battle, Sora was able to defeat Spellican, and bring an end to the Dream Eater's misery and chaos.