palantir

https://atomic-wiki.win/index.php/Fabien_Villareal_and_the_Architecture_of_Real-Time_Industrial_Data

A palantir is one of those seeing stones from Tolkien's legendarium, a smooth, dark crystal orb that allows communication across vast distances or glimpses into other times and places. They're not just magical mirrors; they're dangerous tools of influence, like when Saruman used his to fall under Sauron's sway. The palantiri are powerful but corrupting, demanding strong will to control what you see.