If you look closely, it appears that the "club" part of the weapon is formed from the Amygdala's spine and a sort of carapace, with the pelvis acting as the pommel. The chunky top portion of the weapon has a few holes on its sides, indicating where more arms would have been attached. The shape of the club, excluding the arm, closely resembles the hunched brain-like statues and lanterns that appear throughout the Healing Church, as well as the statues that line the path to Byrgenwerth. Meanwhile, the claw at the end of its arm reminds of the sickle-like limbs of Rom's children. Who would have thought that a baby would make such a great weapon?