
Heaven's Agent |

No; the arcane pool ability only functions on a weapon the magus is holding:
At 1st level, a magus can expend 1 point from his arcane pool as a swift action to grant any weapon he is holding a +1 enhancement bonus for 1 minute. For every four levels beyond 1st, the weapon gains another +1 enhancement bonus, to a maximum of +5 at 17th level. These bonuses can be added to the weapon, stacking with existing weapon enhancement to a maximum of +5. Multiple uses of this ability do not stack with themselves.

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No; the arcane pool ability only functions on a weapon the magus is holding:
PRD wrote:At 1st level, a magus can expend 1 point from his arcane pool as a swift action to grant any weapon he is holding a +1 enhancement bonus for 1 minute. For every four levels beyond 1st, the weapon gains another +1 enhancement bonus, to a maximum of +5 at 17th level. These bonuses can be added to the weapon, stacking with existing weapon enhancement to a maximum of +5. Multiple uses of this ability do not stack with themselves.
Thing is, that Your constantly wielding and therefore holding a Natural Weapon, otherwise IUS would not work with it either nor Haste with Nat attacks and that seems silly... then Again when you see stuff like the Synthesist FAQ I begin to wonder...

Heaven's Agent |

It wouldn't work with unarmed strikes. And though haste does function with natural attacks, that is due to a clarifying post on these boards.
I don't think it would necessarily be unreasonable to allow it to function in such a manner, at least in most circumstances; a multiclass magus/monk might get a tad bit exploitive, but I'm not sure. In any case, just ask your GM if he or she will allow it, and you'll be golden. It's probably the best you'll get until addressed specifically by a developer; this question seems like a very good FAQ candidate to me.

Skylancer4 |

:/ The monk unarmed strike also counts as a manufactured weapon for spells and abilities that enhance attacks. I think this would fall under that heading.
But that is due to language in the ability that specifically calls out unarmed strike to work that way. Natural attacks don't contain that additional clause.

Ksorkrax |

Because if it is held weapons then it does count for the claws, at least with respect to haste. If it works with haste, then why not the arcane pool?
Think of forcing strong surges of elemental energy in your body. Yikes, that hurts!
Haste on the other hand is inteded to work well with bodies.(one possible explanation, frankly I don't care if one rules that arcane pool can be used on nat weaps)

Skylancer4 |

I didn't say anything at all about natural attacks, just unarmed strikes. :P
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:/ The monk unarmed strike also counts as a manufactured weapon for spells and abilities that enhance attacks.I think this would fall under that heading.
My reading comprehension may be lacking at times, but you did say that the natural attacks would fall under unarmed strikes per your post...