Onikiri Yasutsuna

is a Noble Phantasm of Watanabe-no-Tsuna.Fate/Grand Order material XII -Watanabe-no-Tsuna's Profile translated by Savepoints
Originally a famous sword from the Genji clan entrusted to Tsuna by Raikou, it was formerly known as Higekiri. It was also used in the battle against Suzuka Gozen. Shortly after lopping off Ibaraki-douji's arm, Watanabe renamed it from Higekiri to Onikiri. Suzuka Gozen mentions that the Onikiri Yasutsuna also used to be Sakanoue no Tamuramaro’s sword.Fate/Grand Order - Hell Realm Mandala, Heiankyo - Flash of Roaring Thunder - Act 10: Saisatsu Hyoubi (Second Half)
The sword deals special damage against demonic enemies and Oni. The mere sight of the sword pulled out its sheath forces all Oni under a crushing pressure of Rank B. Unless the Oni has a Mental Pollution, Mad Enhancement, or Mental Resistance skills of Rank B or higher, they cannot escape the crushing pressure.
In Fate/Grand Order, it is essentially used just as a normal weapon.
==References==
Category:Noble Phantasms
Category:Anti-Unit Noble Phantasms
Category:C rank Noble Phantasms
Category:Swords
Category:Noble Phantasms introduced in Fate/Grand Order
Category:Noble Phantasms of the Four Heavenly Kings