[Ah, so 'tis a mark from the city itself, not one etched upon their skin of their own volition.]

I showed you the crystal bearing your symbol, aye? I know not if Emet-Selch had imbued some of your magic in it when he created it... or if the memories within simply called to the part of me that you and I share.

[With his free hand, he reaches for Azem's other hand.]

And so in times of great need, I invoked your summoning spell. Though I am told your own use of it was far more... frivolous.