“True, but we are not without our options. Your Fatal Orchid – sorry, the number has slipped my mind, but the armor-piercing one…”
“Oh, right.”
Togame forgetting the form’s numeration was one thing. Shichika replying with those words, “Oh, right.” seemed far more problematic – but anyway, armor-piercing.
This move resembled kenpo more than anything else. A thrusting strike that worked through even shields and armor, scrambling the insides without scrambling the shell – with adequate practice, it could even be applied “long distance”[54] or with “instantaneity.”[55] A quintessential move for the swordless Kyotoryu, but traditional forms of swordplay relied on similar tricks to pull off the acrobatic feat of cutting not the thing before you, but whatever was behind it.
“Fatal Orchid Four: Ryuroku Kako,” said Shichika. “The Fatal Orchid based on Form Four, the Asagao. Among the Seven Forms of the Kyotoryu, it’s the only time I make a fist… Yeah, I could take down Azekura, without harming the Armor that surrounds him.”

[54]  遠当て TŌATE hitting from afar
[55] 発剄 HAKKEI explosive force

Katanagatari Omnibus 2, Page 118