Tuning Stone

Cooldown: 8 - 11 hours, varies by skill
Syntax: cast 'tuning stone' <object>

Acolytes of earth learn early on to identify the deep resonances of stone, a knowledge exploited in the creation of tuning stones. With this working, one such mage may tune an object made of stone to the ground of the room she is in; for a time thereafter, that object will vibrate whenever anyone enters that room, regardless of how far away the object may be at the time. No room may be attuned to more than one object, nor one object to more than one room. Furthermore, it may not be clear who entered the room, just that someone did. While the effect will eventually fade, it is possible to maintain multiple such stones at once.