The feat says this:
Benefit: You do not suffer any penalties on attack rolls made with a shield while you are wielding another weapon. Add your shield's shield bonus to attacks and damage rolls made with the shield as if it was an enhancement bonus.
So, if I have a longsword and heavy spiked shield, do I not take the -4/-4 for TWF?
Secondly, if I have a +2 flaming spiked heavy steel shield/+2 heavy steel shield (enhancements separate) with Shield Master, do the bonuses stack? So, if I bash and roll a 15 do I add the shield bonus AND the shield's enhancement? Or do the shield's enhancement and the SM's bonus not stack?
Benefit: You do not suffer any penalties on attack rolls made with a shield while you are wielding another weapon. Add your shield's shield bonus to attacks and damage rolls made with the shield as if it was an enhancement bonus.
So, if I have a longsword and heavy spiked shield, do I not take the -4/-4 for TWF?
Secondly, if I have a +2 flaming spiked heavy steel shield/+2 heavy steel shield (enhancements separate) with Shield Master, do the bonuses stack? So, if I bash and roll a 15 do I add the shield bonus AND the shield's enhancement? Or do the shield's enhancement and the SM's bonus not stack?