The Specter appears behind Marluxia as his angel of death after Sora defeats his second form. With the Specter, Marluxia can unleash new attacks called Gale of Severance; which blows Sora to the other side of the arena; and Whirlwind; which makes Sora lose his cards if hit. One of the most devastating attacks is an unavoidable attack called Doom; which contains Sora in a magic bind and starts a countdown from 6 to 0, and Sora has to play the cards one by one equal to or greater than Marluxia's sleight, or the angel will hit him with his scythe in a one-hit kill. After Marluxia's defeat, the angel disappears with him.
- The Specter is the second guardian to accompany the final boss in the final battle in the Kingdom Hearts series. The first was Xehanort's Guardian when Terra-Xehanort fought Aqua, and later teams up with Ansem when he fought Sora.