An arcane character with a dark side might choose a skull as a familiar, drawing on its accumulated magical knowledge.

Speed fly 4 (hover)Constant Benefits* You gain a +2 bonus to Arcana and Intimidate checks.Active BenefitsSkull’s Gaze: Once per encounter, you can gain a +2 bonus to an attack roll against a creature adjacent to the skull if you are using an arcane power with the fear keyword.

Published in Dragon Magazine 374, page(s) 27.