Iron Guard’s Glare

With a quick snarl and a glare that would stop a
charging barbarian in his tracks, you spoil an
opponent's attack. Rather than strike his original
target, your enemy turns his attention toward you.
While you are in this stance, any opponent that
you threaten takes a -4 penalty on attack rolls
against your allies. This penalty does not apply
to attacks made against you. Enemies you
threaten become aware of the consequences
of the stance.