This past Tuesday at our groups weekly game my gaming group went up against a werebear. During the fight the groups Monk was bitten and contracted Curse of Lycanthropy. After the game one of my players asked me about his Synthesist Summoner's Eidolon.
He is basically asking if he can apply Cold Iron or Silver to his claw attacks. I have been trying to research this issue, and have found items and feats and whatnot that can give Natural and unarmed attacks those properties, but he is essentially waning to "glue" silver claws to his Eidolon's claws.
Is this even possible? Our group recently switched to Pathfinder a few months ago after playing 4E for almost 2 years, and im still not as up on the rules of the various classes as i should be.
RAW, eldritch claws will do silver and magic.
There are claw blades in the Catfolk write up in the Race Guide, but the problem is they make the claw attacks into slashing weapons, not natural attacks. If you want to allow them to work in your home games it is an option. Not an option if doing PFS however.
Since a Synthesist Summoner is involved, it clearly isn't PFS.
So Short of Homebrew there is no such item... Cool.
What other items could be used then to give the desired effect the the Eidolon?
A +3 Amulet of Mighty Fists or Bodywrap of Mighty Strikes would make his natural attacks count as magic, silver and cold iron. The bodywrap is cheaper than the amulet, but it only applies to 1 attack per round until you have a high bab. If he wants those properties for free, he is just out of luck really. Unless the gm decides to give it to him for free.