A Palantír is a 'seeing-stone,' an ancient and powerful art…
A Palantír is a 'seeing-stone,' an ancient and powerful artifact used for communication and seeing events far away in both time and space.
A Palantír is not evil in itself, but it is a dangerous tool because its power can be perverted by a stronger will.
Sauron uses the Palantír as an open window to project his malice and deceit directly into the mind of whoever dares to look.
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And there are two of those 'black rocks' or 'seeing stones' suposed to be artificial AI. 1 is under Iran, the other in ... greenland. Popcorn time.