Marut

Maruts were one of the inevitables, lawful intelligent constructs native to the Clockwork Nirvana of Mechanus and the plane of Dweomerheart, where they were created by and served Mystra in her role of guardian of magic.

Personality
Maruts cared about little beyond their tasks or the letter of the contracts they were bound to enforce.

Combat
Maruts only entered combat to resolve a dispute or in self-defense, and only used lethal force when a contract called for it or if necessary to ensure their own survival. Empowered with the certainty of law, they were terrifying opponents whose strikes always connected, invariably dealing devastating damage. In addition, they could emanate a blaze of arcane energy from their chests, stunning every creature within a cubic volume on a side.

They were immune to any magical effect that attempted to change their form and were exceptionally resistant to magic. In addition, they were innately capable of plane shifting themselves at will, and occasionally could take up to two creatures with them.

Society
Maruts tasked with ensuring the fulfillment of contracts were known to inhabit the Hall of Concordance in Sigil. There, the kolyarut engraved a contract between two agreeing parties onto a gold plaque and installed it on the chest of a marut, who then became bound to ensure that contract's fulfillment, as well as to punish any party who broke it.

If called upon to resolve such a dispute, a marut's primary mission was to bring the disagreeing parties back to Sigil, where they could resolve their differences before the kolyarut.

History
The original goddess of magic, Mystryl, also utilized maruts, sending them to the Material Plane to do her bidding.

Primus, the One and the Prime, was also known for creating maruts and other inevitables, with the purpose of establishing order in the dealings between inhabitants of the planes.