Earth's Embrace
Prerequisite: Unarmed Strike >= 1, Master Grapple, Brawl BAB >= 4.
          OR: Martial Mastery, Master Grapple, Brawl BAB >= 5.
Benefit: Every turn you maintain a grapple on another creature, that creature suffers your unarmed damage plus your Strength modifier. This is automatic blunt damage and does not require an attack roll, nor does it cost you time.