https://onepiece.fandom.com/wiki/Kitsunebi-ryu
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Homura Saki (焔裂き
Homura Saki?, literally meaning "Flame Split"): Kin'emon slashes his sword to slice an incoming fire attack. This was first used to cut through an explosion caused by pieces of
Smiley[1] and was first named when slicing through the flame breath of one of
Vegapunk's dragons.
[4] This attack was used again against
Kaido, slicing through his Bolo Breath and wounding him at the same time.
[5] Zoro later uses this technique to split the
homie Prometheus in half.
[3] In the VIZ manga, this is called
Blaze Slice, and later
Flame-Rend. In the Funimation adaptations, this is called
Flame Split. *
Letting the Wiki explain as it's better than me doing it lol.