User blog comment:QueenArasene/The Aura bore Alice/@comment-24180511-20130221042158/@comment-4536066-20130227171115

I chalked that up to him actually wanting them to find him.

Lol, maybe they can use their auras to send out homing signals. Like, sending out a pulse such that the other mahjarrat are like, "Wait, wtf was that? I haven't noticed a mahjarrat up in Relleka ever before now. Let me go check it out." Then they arrive and see Kharshai, and they're like, "Whoa, I heard you weren't dead. I guess it's true!"

It also may have been telepathy. Remember that in Nadir, Lucien is annoyed that Moia has to physically meet up with him to report something and then gives her a device that lets her talk to him remotely when he sends her to find Bilrach. Kharshai could have called for Enakhra/Akthanakos that way.