User blog comment:Salubri/Zanpakutō Overview/@comment-1712587-20100517132713

As well as Aizen's zanpaktou i felt that Kyoraku's is a bit of a stretch too. With the "rules" to each game, how are they determined? Obviously a high spiritual pressure cannot help break out o fthe game as the primera espada and Aizen have both been hit with his abilites, so where does it end? is there a certain raduis from kyoraku for the games to apply? does he menatlly decide who is and isn't playing? can others join in, so that say Ichigo could play against Gin now whilst Kyoraku is out of the fight but still alive?

As you mentioned Salubri the comabtive nature of Bleach is indicative of powers used to aid combat - Shinso, Kazeshini, and Wabisuke all excelent examples - but Katen Kyōkotsu doesn't feel to fit the bill in my opinion.