Clerical Work: Specialty Priests of Myrkul for D&D 5th Edition

I'm importing the idea of Specialty Priests and channeling a bit of DnD 4E by treating them as Feats.

Specialty Priests of Myrkul

Gray Ones Feat

Prerequisite: Cleric with Death Divine Domain

• You are immune to parasites and disease.

• You gain necrotic resistance.

• Whenever you make an Intelligence (Arcana) check related to undead, you are considered proficient in the Arcana skill and add double your proficiency bonus to the check, instead of your normal proficiency bonus.