The spell is basicly a stronger version of Bram Fang. It creates several "arrows" of compressed air, which are able to affect a reasonably large area. Bram Gash is strong enough to produce lethal wounds or break through a brick wall.
eien wo suiki yukisugi yuku kaze yo
waga te ni tsudoite chikara to nare
Wind which blows across eternity
Gather in my hands and become my strength