If you could control a great many threads and use them to create complex structures and powerful warriors, then your path lay with the White Thread. This was known to every monster at the Forgotten Mills.
Obviously, if a monster's abilities were related to a needle as well as its fighting style, that monster would gladly be accepted into the Gray Needle.
There was no mystery to this, and the conditions were logical.
But what about the Black Cut?
Well, as in any other case, they stood out, and not in the best way.
Sure, in order to become part of their faction, a monster had to possess cutting abilities, as implied by the faction's name. However, that wasn't enough.
The monster had to receive approval from three other monsters from the Black Cut, and if anyone objected, the monster contender was obliged to either convince that monster or defeat it in battle.