Arcane OrbAdds extra pure damage to Outworld Devourer's attacks, based on his remaining mana pool. Steals 2 intelligence for 50 seconds per hit when attacking an enemy hero. Arcane Orb also does bonus damage to summoned units and illusions. Arcane Orb is a Unique Attack Modifier, and does not stack with other Unique Attack Modifiers.
Astral ImprisonmentPlaces a target unit into an astral prison. The hidden unit is invulnerable and disabled. When the astral prison implodes, it deals 75 damage to enemies in a 400 radius around the target.
Essence AuraWhenever nearby allied Heroes or Outworld Devourer itself casts a spell, it gains a chance to restore a percentage of its mana pool. Outworld Devourer also passively gains a bonus to its base mana pool. Several skills with no cooldown and toggled spells cannot trigger Essence Aura.
Sanity's EclipseUnleashes a psychic blast that removes 40% of the mana from affected heroes, while also damaging them based on the difference between the affected hero's Intelligence and Outworld Devourer's. If an enemy hero has the same or higher Intelligence than Outworld Devourer, Sanity's Eclipse will not cause damage. Sanity's Eclipse can hit units trapped by Astral Imprisonment. Upgradable by Aghanim's Scepter.