Amakakeru ryu no hirameki 

The ougi (succession technique) of Hiten Mitsurugi Ryu. Basically a Battou Jutsu that surpasses Shin Soku (God Speed).

Hiko taught Kenshin Hiten Mitsirugi ryu in Kyoto for the battle against Mokoto Shishio.

Amakakeru ryu no hirameki by KawaiiAnime June 22, 2006