Fist of stone, does it stack with other bonuses?

[Faskill]

Hello,

I was wondering about the Fist of Stone spell (from CAr)

In the description of the spell it is written that it makes you gain

a +6 enhancement bonus to Strength for purposes of attacks, grapple checks, or breaking and crushing items.

To me, it seems like it is a special "enhancement bonus" to Str because it just applies for certain types of attacks or checks, not increasing your actual Strength.

So I was wondering if you'd think that it would stack with something like Bull's strength for example (I'd appreciate references)

Thanks in advance

 

[Sekhmet]

Enhancement Bonuses don't stack with other Enhancement Bonuses, though they are both in effect simultaneously.
You would use whichever bonus was better at the time. For example:
Fist of Stone gives you a +3 to Attacks, Grapples, and Breaking/Crushing, but not to skills keyed to strength.
If you had both active, you would get +2 to all str Skills (from Bull's Strength), and +6 to attacks/grapples/breaking/crushing.

 

[Herzog]

That should be:
If you had both active, you would get +2 to all str Skills (from Bull's Strength), and +3 to attacks/grapples/breaking/crushing.

Fist of stone gives +6 to str, resulting in a +3 str bonus