I always assumed that the 'default' appearance of the Dark Urge was it using the Disguise Self Spell, which is what made catching them so difficult, hence why we can customise their race, gender and class since Disguise Self is a fairly low level spell one can procure via scrolls, wands, items or as a learned spell. I am morbidly interested in why they made their killings so public, and what role Fel, the scheming little whatever, played in it. Curious to see how they play in game.
