Wizard Watch
(Alteration, Divination)

Range:  10 yards
Components:  V, S, M
Duration:  Permanent
Casting Time:  1 hour
Area of Effect:  One room
Saving Throw:  None

This spell creates a special version of the wizard's wizard mark to be placed in a room of the wizard's choice. This sigil will allow the wizard to view the room from any distance as if the wizard was scrying into the room with no chance of failure. The sigil itself does not do the seeing, but it only defines the room that can be viewed, thus the wizard can view the room from any viewpoint inside the room, but not from outside the room. The information received is limited to visual only.
Since the sigil is easily noticed, it can be hidden, or have its design mixed in with the dcor of the room and be hidden that way.
If the sigil is created in an outside area, not bounded by walls, then the viewpoint can be anywhere within a 10-yard radius from the location of the sigil.
Any creatures that are in the room which is actively being watched will have a chance to detect the scrying of the owner as defined the Dungeon Master's Guide, page 141. If they use dispel magic to counter the scrying, then the sigil will remain inoperative for a period of one day (this does not mean that the wizard might not have more sigils in the room. As long as they remain inactivated, they will not be affected by the dispel magic).
The spell is permanent until the sigil is tampered with, or destroyed.
The material components for this spell are mercury and 1000 gp worth of carbuncle dust, mixed to form a glue base as well as a dragon scale with the sigil carved on it. The mix is poured onto the dragon scale "mould" and pressed against the area where the sigil is to be put. The spell is cast, and the new sigil remains in place.

