Quote Originally Posted by noce View Post
Luck of Heroes is a Regional feat from Player's Guide to Faerun.
This means it requires to be of one of the races listed, from one of the regions listed, and to take that feat at first level.

I cannot explicitly describe the feat, but it's half the proposed feat, plus another minor benefit.

That said, yes, I think this feat is unbalanced, and I'd always consider it on a mundane build.
After all, in my experience a failed save is the most likely end mundane characters encounter.
Oh it shows up elsewhere too? I altered this from Honor Bound (Dragonlance Campaign Setting) where it's +2 on saves when failing the save would make you break an oath/promise/honor code/etc.