Glassee

By means of this spell, the wizard is able to make a section of metal, stone, or wood as transparent as glass to his gaze, or even make it into transparent material as explained hereafter. Normally, up to four inches of metal can be seen through, stone up to six inches thick can be made transparent, and 20 inches of wood can be affected by the glassee spell. The spell will not work on lead, gold, or platinum. The wizard can opt to make the glassee work only for himself for the duration of the spell, or he can actually make a transparent area, a one-way window, in the material affected. Either case gives a viewing area 3' wide by 2' high. If a window is created, it has the strength of the original material.

[Player's Handbook]

School: Alteration
Level: 6
Rarity: Common

Range: Touch
Components: V, S, M
Duration: 1 round/ level
Casting Time: 1 round
Area of Effect: Special
Saving Throw: None

Material Components: a small piece of crystal or glass (consumed)