[theunknowndm]

How would I make the following magic weapon work as a secondary natural weapon for herolab?

GRASP OF DROSKAR:
Aura moderate transmutation and divination;
CL 10th
Slot gauntlet; Price 12,302 gp
Description
This left-handed black iron gauntlet appears
little more than a dull soot-stained plated
glove at first glance, but in truth it is a
powerful boon granted by Droskar to his
most faithful subjects. Placing the glove on
your left hand causes excruciating pain as
your appendage curls into a tight fist and
then slowly transforms to supernaturally
hard black stone. You cannot use your left
hand for anything beyond smashing it into
objects or creatures (you cannot carry a
shield or secondary weapon and you take a
–4 on skill checks that usually require two
hands). The gauntlet cannot be removed
without a successful casting of remove curse,
break enchantment, or a similar spell.
T he gauntlet grants you a +2 enhancement
bonus to Strength and acts as a +1
adamantine gauntlet. The item also grants
you the ability to use the gauntlet as a
secondary natural weapon. In addition, the
Grasp of Droskar allows its wearer to use
stone shape once per day.

Construction Requirements:
Craft Wondrous Item, bull’s strength, magic fang, stone shape; Cost 7,802
gp, 360 XP