Aura

Auras are passive abilities that grant a buff to units in an area of effect around the holder.

Positive auras will bestow their effects on nearby friendly heroes. Certain auras will also affect creeps and summoned units, and some can be toggled between affecting all units and only affecting heroes. Certain auras will only affect melee units, while others will only affect ranged units. All positive auras will affect the holder as if it were another unit in the area of effect.

Negative auras will affect all nearby enemy units, even if they are invisible. Radiance and Rot are the only negative auras that can be toggled off.

Auras do not cost mana to maintain or toggle. However, if an aura's holder is silenced or Doomed it cannot be toggled on or off. Auras do not have a duration and will last until their holder dies. Some auras are only bestowed by temporary units, such as Healing Ward.

Illusions can bestow some auras, but they usually will not benefit from them. Most auras do not stack with other identical auras.

Positive Auras

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