Psi Crystal

Psi Crystal
This crystal grants you telepathy for as long as you remain attuned to it. See the introduction of the Monster Manual for rules on how this telepathy works. The crystal also glows with a purplish inner light while you are attuned to it. The higher your intelligence, the greater the light's intensity and the greater the range of the telepathy
3-7 15 feet Dim light out to a range of 5 ft
8-11 30 feet Bright light in a 5-ft radius
12-15 60 feet Bright light in 10-ft radius dim lig