Wendiego's page

By default, without any of the TWF feats, you can choose to two-weapon fight, but the penalties are outrageous. -6 to your main-hand attack and -10 to the off-hand, -4 and -8 if you use a light off-hand. This allows you one off-hand attack only. The TWF feat only reduces the penalties to a manageable level; -2/-2 if you use a light off-hand, -4/-4 otherwise. Then, the ITWF feat allows you a second off-hand attack. You start with one off-hand attack as a given, but must take ITWF to gain a second off-hand.
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Thanks for the answer guys, but I'm not seeing why you couldn't get a Fourth attack without ITWF based on your first sentence. Granted it would be at crazy negatives [Longsword -3/Short Sword -7] but is it possible?

Sorry for resurrecting the dead, but I was wondering. In the first example can't the attacker still swing his short sword at the un-feated -4 [Light weapon in off hand], since his BAB is +6/+1 [+9/+4 with str bonus] giving him his second attack?

So it would look like Longsword +7/Short Sword +7/ Longsword +0/Short sword +0.

And would the -2 from TWF fighting stack for

Longsword +7/ Short Sword +7/ Longsword -2/ Short Sword -2?