Prismatic Sphere

A permanent prismatic sphere is most often used as a private sanctum for the designated owner. It’s usually stuck into the center of a laboratory, but some paranoid characters even sleep inside one.

When you create a permanent prismatic sphere, remember that the sphere actually cuts through the floor and into any room below, which might render that room uninhabitable. Some cunning architects place their private chambers directly over their treasure vaults. This way, they get the double benefit of the full protection of the sphere in their daily lives, plus they can count on the sphere’s blinding effects to affect anyone with less than 8 HD that wanders into their vault.

Other characters mount a permanent prismatic sphere in the single doorway into their stronghold. This effectively keeps anyone else from leaving or entering the place, so this tactic is mostly used only by hermits or characters who have other means of getting their staff members in and out of the place.

Similarly, such a sphere could cover an escape hatchway, making it difficult if not impossible for pursuers to follow you into the sphere one way and then out the other.

Casting: 1,530 gp (Clr17 or Wiz17) or 1,620 gp (Sor18)

Permanent: 23,350 gp (17th)