Aura strong conjuration; CL 20th; Slot none; Price 150,000 gp; Weight 1 lb.
This odd stone lantern seems out of place no matter where it is located. When lit in a dark area, the light it casts on any wall reveals visionary windows to other times and places. If no time and place is chosen when the lamp is lit, a random one manifests. The viewed location must have a surface of at least comparable size for the window to appear on. This window is two-way, but does not allow travel. If creatures viewed can traverse the distance on their own, however (such as via teleportation), they might investigate the lamp’s subject. The chosen subject can be in the future or the past and at any location, although the location is accurate only to within 100 miles and the time is accurate only to within 10 years. The lamp can be used once per hour by burning 1 pint of oil. Extinguishing the lamp closes the window. If fuel remains and the lamp is activated once more, it shows nothing unusual.
A new window cannot be opened until the lamp has burned for 1 hour total, using up the entirety of its fuel. Extinguishing the lantern and adding a new pint of oil to refuel it is required before the lantern can open another window.
Sandy Petersen’s Cthulhu Mythos, © 2017, Petersen Games; Authors: Sandy Petersen, Arthur Petersen, Ian Starcher.