They’re a limited-use item - once they do enough to fulfill their oath, they won’t keep fighting. In the books, they didn’t even get as far as Minas Tirith - they were done once they defeated the corsairs. Also, it wasn’t clear that they could actually cause physical harm.
They’re a limited-use item - once they do enough to fulfill their oath, they won’t keep fighting. In the books, they didn’t even get as far as Minas Tirith - they were done once they defeated the corsairs. Also, it wasn’t clear that they could actually cause physical harm.