Mavin's Worldweave

Effect

The worldweave allowed an archwizard to change the weather patterns of a large parcel of land until dispelled. Throughout Netheril’s existence, this spell was used hundreds of times to stay the effects of the polar ice in its northern borders. This gave Netheril’s land a temperate climate instead of one more suited for its placement on the globe—a subarctic clime. With cast, the archwizard was able to change the climate of an area by one grade—either up or down. Refer to the table below to determine the grade changes possible. It was possible to change the climate more than one step, but multiple layers of Mavin’s worldweave were required.  
Material Components
Components: V, M
Related Discipline
Arcanist, Inventive
Related School
Conjuration, Necromancy
Effect Duration
Permanent
Effect Casting Time
10 rounds
Range
Sight
Level
9