If I use an Amulet of Mighty Fists to give Spell Storing to the natural weapons granted by the Dragon Shaman's Totem Transformation ability, when the natural weapons go away, do they retain the spells I cast on them or do the spells disappear when the natural weapons do?
I can see it going both ways, since you still have your teeth and nails.
(Please assume that the amulet "gives" the enchantment to your natural weapons, rather than having an enchantment that applies to the natural weapons, meaning that spell storing would be instanced by each natural weapon)