Aizen Souke's Abilities

Aizen Sousuke is the best bad ass anime of bleach, and calm fighter. All shinigami's of Bleach has Specials technique's Zanpakto skill, but Aizen Sousuke Zanpakto's ability was hypnosis. Means, by his Zanpakto ability create an illusions. With this kind of abilities you can't catch the real Aizen Sousuke. You can't even say that you fighting the real Aizen or not. Means you can't kill Aizen Sousuke.