Vorundil can guide the Vestige towards the Blood Matron's Crypt.
"Ah, that look. So familiar. Your mouth is dry, your blood boils in your veins, while your skin turns as cold as ice. Your body does not accept the blessing for what it is. It resists."
- I don't know how to do either. "If you wish to reject it, a wretched priest of Arkay will gladly take your coin to do so. Otherwise, listen to the blood that pulses through you. Let it guide you to Rahaja. She will show you the way to Mother Lamae's embrace."
- Thank you. "Follow your blood. It will lead you to Rahaja. Perhaps we will be kin one day."