Lexicon

Number VI(6)of Organization XIII,Zexion`s weapon from both Kingdom Hearts:CoM, (chain of memories, defeated by Riku, killed by Repliku) and Kingdom Hearts:Final Mix. In Chain of Memories Riku battles Zexion on a replica of Destiny Islands, Riku, Sora, and Kairi`s hometown. After Zexion is defeated, Axel orders Repliku to drain his power/life force, thus causing him to fade away.

Zexion used his Lexicon to cast a spell
Zexion used his Lexicon to trap Sora in another dimension.