This extract was taken from the homepage of Magicduel

~ Technique description, Part 1 ~

In the centre of a vortex, a shape constituted of two perpendicular planes intersected through their centers. The shape is complete when it expands to the outer limits of the vortex's axis. The shape is to be formed on the vertical axis and it moves along with the base of the vortex. As time passes the shape becomes more defined, and its movement takes the movement of the vortex, the four planes managing to disrupt the continuity of the vortex. The process resembels a spiral being shattered by an equal-sided cross. This is used to stop small whirlwinds or even twisters and to ward against the wind, be it made by man, nature or symbol.

This is an except from a Spell Document. Spell Documents are part of Inner Magic which is currently partially implemented.