Using a weapon 2-handed with power attack allows a PC to deal double the penalty. I get that.
Now, does that stack with Power attack mastery 4? I mean that if I took a -5 penalty to my attack with a Greatsword, I would deal power attack damage of +25? By the way it's worded in the rulebook it seams it would stack...
Thanks in advance.



Good lord, there's no end to what players try to get away with.
A little sense is all it takes to realize some things just shouldn't be,
and won't be in your games, even if that's how they were designed to work; you seem to have it and the will to use it, so good on you.