Aura

Aura refers to an effect which constantly, passively radiates from the user to all others within a radius around the user. Auras can be helpful or harmful.

An aura differs from a normal buff or debuff in that auras are centered on the caster, while buffs and debuffs are actually applied to those they effect.

For example, once debuffed, an enemy will carry that debuff with them no matter how far they travel (until the debuff expires). A negative-effect aura, however, would cease to affect him immediately if the enemy moved far enough away from the aura's source.