Board Thread:Questions and Answers/@comment-10797017-20130624101208/@comment-11051098-20130714195751

Skitzo1 wrote: I doubt he would have had a reason to use the higher ones, maybe he doesn't know them, maybe he thought it would take to long. But more importantly I think hado 96+ require some sort of sacrifice. If number 96 was that powerful, and it needed an arm. I would assume the higher kido would need a greater sacrifice.

It was said that one had to use ones body as a catalyst to use Ittô Kasô. I think Yamamoto survived only losing an arm because he was that powerful. Less powerful Shinigami would've probably had to sacrifice their life.

If I remember correctly, Hachi used Bakudô 99 part 1, Kin, to restrict Kensei, before all of them fell victim to the hollowfication. But that was Bakudô, though, not Hadô. I don't know if it's the same with the strongest spells of both kinds.

But Kin didn't need any sacrifice to be used, it was just very powerful.