Snapping Turtle Clutch

While you are using the Snapping Turtle
Style feat, the shield bonus the style grants
to your AC applies to your CMD and touch
AC. Whenever an opponent misses you
with a melee attack while you are using the
Snapping Turtle Style feat, you can use an
immediate action to attempt a grapple
combat maneuver against that opponent,
but with a -2 penalty.