The spell creates a ball of ice in the air which continues to shoot out icicles into the area. Either because the spell is still incomplete or perhaps because it was cast by Naga, the caster has no control over Freeze Rain. To end this spell, the ball of ice has to be destroyed to prevent icicles from spraying out for all eternity.
(Article taken from Slayers Universe.)
- ↑ Encyclopedia Slayers, pag. 231