I know that when you use a natural weapon (such as a bite) with a manufactured weapon the natural weapon is considered to be secondary and thus takes a -5 to attack. My question is, does this still apply when you're using the natural weapon in place of a "normal" attack? In other words, if you were twf with a dagger and a claw would the claw still be at a -5 penalty? In this example the user would not be getting "extra" attacks outside of what his Bab would normally allow.
You can't TWF with a dagger and a claw. You can make a normal set of iterative attacks with your dagger, and a secondary attack with your claw at -5.
You can never take iterative attacks with a natural weapon.
All natural attacks will be at a -5 penalty (from full BAB) if you make at least 1 attack with a manufactured weapon as part of the same full-round action.
It doesn't matter how many natural attacks you have, how many iterative attacks you make, or how many manufactured weapons you attack with (as long as it's at least 1 attack).
To take some examples:
- If you have a BAB of +1, you can make one dagger attack (at +1) and one claw attack (at -4), both as part of the same full-round action.
- If you have a BAB of +6, you can make two dagger attacks (at +6 and +1), plus one claw attack (at +1), all three as part of the same full-round action. If you choose to only make one dagger attack, that won't affect the claw attack at all.
Natural weapons don't get to use TWF because natural weapons can not make iterative attacks.
You get to attack normally with the dagger, and then use the claw at -5 once.
You're looking for the Multiattack feat rather than TWF - it reduces the secondary weapon penalty to -2 instead of -5. However, you need to have 3 natural attacks in order to qualify for the feat.