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Small outsider, any chaotic

Armor Class 16
Hit Points 7 (2d6)
Speed: 90 ft. (fly)

7 (-2) 18 (+4) 12 (+1) 16 (+3) 14 (+2) 15 (+2)

Skills: Arcana +5, Perception +4, Survival +4
Senses: darkvision 120 ft., ethereal vision, passive Perception 14
Damage Resistances: acid, fire, lightning, thunder, spell resistance
Damage Immunities: poison, bludgeoning, piercing, and slashing from nonmagical attacks
Condition Immunities: grappled, paralyzed, petrified, poisoned, prone, restrained
Languages: Auran, Common, Celestial, Draconic, Infernal plus the native language of any master to whom they are bound
Challenge: 1/2 (50)


  • Bound: A mercurial can travel to a distance away from its master of no more than 500 feet per level of the master. If a mercurial attempts to travel beyond this range, it encounters an unseen and impenetrable barrier.
  • Ethereal Sight: The mercurial can see 60 feet into the Ethereal Plane when it is on the Material Plane, and vice versa.
  • Incorporeal Movement: The mercurial can move through other creatures and objects as if they were difficult terrain. It takes 5 (1d10) force damage if it ends its turn inside an object.


  • Incorporeal Touch. Melee Weapon Attack: +6 to hit, reach 5 ft., 1 target. Hit: 2 (1d4) force damage, and target loses 1d4 points of Charisma. If Charisma reaches zero, the target stops moving, loses all sense of self and sentience, and is considered an object thereafter. The body begins to shut down and dies within 1d20 minutes unless Charisma is raised above zero, which can be done via restoration, greater restoration, wish, or a similar magical effect (though not cure wounds). Lost Charisma returns at a rate of 1d6 per short rest or entirely after a long rest.


A mercurial is an insubstantial spirit from the Methetherial plane, blithe and carefree, existing only to experience visual sensations. They have no physical form, existing as incorporeal creatures. Mercurials have no sense of taste, touch, or smell. They can hear and see normally.

Section 15: Copyright Notice

Familiars & Companions, Copyright 2017, Troll Lord Games; Author Casey Christofferson, Justin Bacon, Tommy Ruteledge, Josh Hubbel, Lance Hawvermile, Luke Johnson, Stephen Vogel and Dave Zenz.