Legion is sure that just their ten slaves will be enough to do the job of defending their territory for them. And they believe that it would be easy for their slaves to do too.
But they don't want people to know that the leaders of the Golden Hammer gang have been replaced, and they don't want people to learn that the leaders of the Golden Hammer gang have increased in number again.
They don't want to reveal anything about their slaves that isn't already known, which is why they only plan to use the three original slaves from the Hammer series that everyone knows about to defend their territory.
Of the original nine slaves that they had, only Golden Hammer, the Walker, the Thief, and the Fate Weaver are still alive. The Fate Weaver's existence is kept hidden, so only Golden Hammer, the Walker, and the Thief will be made to defend their territory in public.