As this part of the battle begins, watch for Sora to get pulled into a chain of reactions. You can tell that this is about to occur when he grabs Sora and says, "You shall go together." Use the Reversal Reaction Command repeatedly to dodge a chain of attacks. This deadly combo ends when he says, "Be gone!" The Reversal Reaction enables Sora to dodge the dark energy waves. This isn't his most powerful attack, but it is used the most. If you can't see him, listen for him to say "Mine" to know when he is using it. Riku also has a number of Reaction Commands that can help during this battle. Think of the Dark Shield Reaction Command as something akin to the Reflect spell, while Dark Aura serves as a nice Projectile attack. Xemnas is tricky and loves to confound his enemies with a clone. Watch as the two separate, and try to pick the one that looks to have the most substance during the split. This is a tough technique to follow and even more difficult when trying to compensate for his teleportation ability. Keep your HP at above half and attack during Xemnas' delays between moves. Although Drives aren't available, the Session Limit with Riku is. Use it whenever possible, but don't neglect Sora's health. Riku will heal Sora, but don't take it for granted. Next, watch for his laser attacks. During this time, focus on surviving the onslaught. The best way to handle this attack is to counter with a few carefully timed Reflect spells or with Dark Shield. A temporary retreat can work if Sora is low on HP and there is no means to cure. Jump away while constantly tapping the ^ button to deal with any Reaction Commands. Given enough time, Riku will eventually heal Sora. After taking significant damage, Xemnas captures Sora. This forces you to play as Riku. Work your way to Sora while repeatedly casting Dark Aura to push back Xemnas' clone. Free Sora with a Reaction Command to regain control of him. Continue the assault until the final sequence. When Xemnas is almost defeated, he starts a super-fast laser attack. To reflect the laser, rapidly tap the ^ and X buttons (in other words, Reaction and Attack). This is a tricky sequence and one mistake will spell certain death. Make it through this portion of the fight and the game will end in a spectacular fashion!