This spell is used to create a jet of clear water and to control it. Taken from the 5th book of Elendil. It has been under some controversies but it was approved valid by Professor Severus Snape who used it in a duel against Sirius Black. This spell can be exceptionally useful to put out fire. Besides it can be used to create a defensive wall to keep out some attacks like animal summoning charms and other minor charms like rictusempra and evarte statum. But it cannot be used to defend powerful curses.