There is a merchant named Lianna Ferasa (P3990 P1475 in Rathe Mountains; close to the zone-in from Lake Rathe) who was Regis the Reverent's lover. She does not respond to hails. However, if you ask her "What happened to Regis the Reverent?", she will tell you how her beloved met his demise at the hands of Zahal the Vile. She tells you where Regis is located in North Karana, and tells you that if you kill Zahal, "Regis' body will rise from the place where he died." She also tells you that if you find her flute on Regis' body, to return it to her.
When you turn-in the flute to Lianna, she tells you "Thank you for setting his spirit free. Keep his memory alive with this." She then hands you an Ingot of the Reverent (check your inventory), despawns, and then immediately respawns.
-- Ainulindalex, 72 Half-Elf Bard of Povar (formerly Quellious)
edit: I have both the Icon of the Reverent and the Ingot of the Reverent in my inventory now. I do not recall having the ingot in my inventory prior to handing in the flute to Lianna, but perhaps I did. Regardless, Lianna definitely gives you the Icon of the Reverent after you hand her the flute.
Edited, Jan 31st 2015 12:21pm by zippergut