Creatures that create the bonebane are usually not adverse to sacrificing the bonebane in order to have it do as much damage as possible before it is destroyed.
The bonebane skeleton is considered a disposable creature by those that create it. Whenever it does damage it leaves sharpened bone fragments of itself behind. This makes it more dangerous, but over time there is little left of it.
Religion DC 16
Often a bonebane will latch onto its victim by driving bones into the victims flesh, thereby attaching itself. It is extremely difficult to remove at this point; and during this time it continues to attack its victim.