Grievous

When your attack roll with this weapon is a critical hit and gains the critical specialization effect, you gain an additional benefit depending on the weapon group.

Axe You can damage a third creature, with the same restrictions.

Bow The Athletics check to pull the missile free is DC 20.

Brawling The target takes a -4 circumstance penalty to its save.

Club You can knock the target up to 15 feet away.

Crossbow If the target of the critical hit is adjacent to a surface, it gets stuck to that surface by the missile, as the bow critical specialization.

Dart The base Off Guard until the end of your next turn.