I cannot say I am familiar with the usage of mirrors or crystal balls in such ways. Linkpearls, however, are another story.
[Which are... magical pearls you wear on your ear, allowing you to talk to people one on one or to a group. Which, it's never fully explained through canon how it works, or why it's pearls of all things, but whatever!]
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[Which are... magical pearls you wear on your ear, allowing you to talk to people one on one or to a group. Which, it's never fully explained through canon how it works, or why it's pearls of all things, but whatever!]