Banish Tyr-Storm (Reversible)

This useful dweomer shoves dangerous Tyr-storms away from a particular area such as a town, field, or camp. The wizard is able to force the storm to leave its normal path and head off in a direction of his choice. The storm continues to rage and causes normal damage wherever it goes, but the spell allows the wizard to keep it out of an area he wants to protect. Cerulean wizards who banish Tyr-storms may not attempt to draw off their energy; further, if an unsuccessful attempt has been made to draw the storm's energy into a lens, this spell automatically fails.

The reverse of the spell, summon Tyr-storm, draws a Tyr-storm into an area designated by the wizard. The storm is typical of those spun off from the Cerulean Storm and does the same amount of damage. A Tyr-storm is a violent tempest and can't be used to bring needed water to anyone or anything. The rain and hail damages people and vegetation; it doesn't sustain them. Cerulean wizards who summon Tyrstorms may not draw the energy into their blue glass lenses.

The material component for this spell, including its reverse, is a blue glass lens like that used by cerulean wizards.