This is part of my “Pyre” world.
A number of ancient sentinels wander the empty streets of Pyre. A common design involves a large humanoid about 10 feet tall, hunched over slightly, with large forearms, and made entirely of orichalcum. A tiger-like creature was another common design.
Oriforged Constructs are powerful at melee attacks only, and can only remember simple instructions, usually “Keep anyone from entering this area.” They have high hit points and do a lot of damage, and are very easy to hit.
Because of their programmed nature, certain crystals will deactivate a Construct when waved directly in front of it.