Bleach Episode 176: Mystery! The Sword-Consuming Assassin
Episode 176 of 366 of Bleach, aired June 25, 2008, 24 minutes. Available with English subtitles and dub where released.
Episode summary
Refusing to give up Rurichiyo, Rukia uses her special ability to encase her new opponent Douko Jinnai in ice, but he easily breaks free.