Steel Watchers are a non-playable Construct race in Baldur's Gate 3. Steel Watchers are characterised by their imposing size and ability to self-destruct. They almost exclusively appear in the city of Baldur's Gate.
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About Steel Watchers
The operations of these huge steel juggernauts are powered by engines of churning hellfire.
Created by Enver Gortash to serve him, Steel Watchers uphold the law in the city of Baldur's Gate. Steel Watchers are formidable foes with large amounts of health and multiple Resistances.
If the player fully explores the Steel Watch Foundry they discover that the Watchers are not fully mechanical; rather, they are hybrids of technology and necromancy. Each unit is built around a zombie whose brain has been removed, infected with a Mind Flayer Tadpole, and preserved in vats at the Foundry, where Banite cultists can use them to remotely control the corresponding Watcher.
With the exception of Steel Watcher Titan, Steel Watchers will gain the condition 
when their hit points are low. This is caused by the passive feature Failsafe Protocol. The explosion will deal 4d12+26
Fire damage in an area around the Watcher. This attack ignores resistance and immunity to Fire damage. Target will still take half damage on a successful 
Dexterity saving throw.
Types of Steel Watchers
Quests
Related items
- The Steel Watcher Titan wields
Gontr Mael, can be looted after killing the creature. 
Steelwatcher Helmet
Hellfire Engine Crossbow
Watcher Greatsword
Infernal Iron
Enriched Infernal Iron
Immiscibility of Fluids
Notes
- Karlach's heart is a prototype engine for the Steel Watchers.
- During the quest Disable the Steel Watch several Hellfire Watchers and a special Steel Watcher Titan can be found in Steel Watch Foundry.