I have a 4e dnd character that has the lich template. Can I suppress the necrotic aura, and if so what kind of action is it? Ive looked elsewhere and I cannot seem to find an answer anywhere that explains auras for PC's. Thanks guys!
From DDI glossary definition of Aura:
Deactivating an Aura: A creature can take a minor action to deactivate or reactivate one of its auras. However, certain auras have set durations and cannot be reactivated after they end.