Dear Attila Square,
Alas, you have discerned the answer already! The Elder Hammer - another legend I can now recall. In the Third Age, a Gielinorian mystic by the name of Alan, inspired by a vision, wrote of the Hammer by which ancient gods first fastened "with little tiny nails" Anima to the Sacred Clay. By striking the clay of the Primordial Realm, they brought it to life, so that forever after it would long to take definite, living form. Indeed, clay does strange things when struck - but only an ancient creatrix can so wield the Hammer to produce new life; what use it might serve in the hands of lesser beings I know not.
After it was used to wake the Sacred Clay, the Hammer was likely abandoned upon an ancient world. And in its presence the nail beasts and talon beasts were born - manifestations of its primordial purpose. Like so many other unfortunate creatures, they were brought to this world to fight in the Wars. Only the strange charms reflect their divine origin and their sad tale.
With the blessings of balance,
Filliman Tarlock
13-Dec-2016 00:46:17