The spell turns water into a single sharp blade which cuts through practically anything. However, it needs a large body of water to be present nearby in order to function.
(Article taken from Slayers Universe.)
soukyou yori mo aoki mono
umi no fukaki ni nemuru ou
nanji no kuraki kooreru yaiba de
waga maeni aru teki wo ute
- ↑ Encyclopedia Slayers, pag. 226