If "Sosuke Aizen" is not on your field, this card's card name changes to "The Oozing Crest of Corruption! The Arrogant Vessel of Madness! Deny the Seething Urge, Stun and Flicker, Disrupt the Sleep! The Crawling Queen of Iron! The Eternally Self-Destructing Doll of Mud! Unite! Repulse! Fill the Earth, and Know Your Own Powerlessness!! Hado Number 90: Kurohitsugi!" in all locations. Choose one character with 4000 or less BP on your opponent's front line and sideline it.