But they're robots!They're not fey, that's what!
Probably we want to make this a choice of the drifter to alert all the other sheens in the hive (is it hive?).SRD said:Mental Alarm: A mental alarm alerts you (and only you) so long as you remain within 1 mile of the warded area. You note a single mental “ping” that awakens you from normal sleep but does not otherwise disturb concentration. A silence spell has no effect on a mental alarm.