Frontiersman and Region Traveler
Night Walkers usually lead small groups of wandering priests that are more commonly found in frontier regions that have few or no dedicated temples (such as the Savage Frontier).
It is best that the dead stay within our sphere of guidance, do not share the secrets of the dead even as it makes us reclusive. We must remain stoic, almost aloof, in our macabre duty.
Share history of our Doombringers, champions of Myrkul who travel Faerûn avenging the deaths of those to whom they had sworn oaths or slaying those who dare mock the Lord of Bones.
Do not lax in your education as an experienced necrologist. Be well-versed in the identification, abilities and lore regarding the undead and the many forms of death.
Adventuring Myrkulite priests have no need to hide our allegiance as death would come to all eventually (sooner, it is rumored, for those foolish enough to molest a Myrkulyte).