As Kidō No. 99, Five Dragon Destruction's power was beyond question. But its record of actually defeating anyone was about on par with Amaterasu from Naruto—burning fiercely without killing anyone. There were several reasons for that. First, this move required an enormous amount of spiritual pressure. An ordinary captain would probably be drained dry after using it once.
Second, this move was mainly meant for groups. In terms of single-target power, it might not even surpass Kidō No. 90, Black Coffin. When Hogyoku Aizen faced Mugetsu Ichigo at the end, he chose that Kidō instead of Five Dragon Destruction.
That was why it was so awkward to use. It was not particularly useful against powerful enemies, yet using it on cannon fodder was far too wasteful. Of course, if the goal was simply to show off and demonstrate one's strength, that was another matter.
However, Five Dragon Destruction had one advantage: it drew attention. In the original work, Kisuke Urahara later used this move to distract Tokinada Tsunayashiro and reach an agreement with Aura Domae.
When it came to destructive Kidō, Shen Fei's preferences were similar to Aizen's. He favored Kidō No. 90, Black Coffin, as well as the Kidō No. 61 Binding Spell that Byakuya Kuchiki excelled at, Six-Rod Light Prison.
"Hidden Kidō? Zero Division really does come up with all sorts of strange things."
Although Kidō was said to have a hundred spells, both Binding Spells and Destructive Spells actually only went up to No. 99. Kidō No. 100 did not exist—or rather, it existed only within Zero Division.
Shen Fei had initially assumed Hidden Kidō was stronger than ordinary Destructive Kidō. But from Tokinada's memories, he learned that, strictly speaking, Hidden Kidō was not stronger than normal Kidō. Its power came from the strength of its user.