You are an expert at hand-to-hand combat, which grants you the following benefits:
- Your unarmed strike gains the versatile property, allowing you to increase its damage die by 1 size if you have both hands free when you make the attack (d3, d4, d6, d8, d10, d12).
- Your unarmed strike attack rolls do not have disadvantage while you are restrained.
- When you use the Attack action to grapple or pin and succeed, you also deal your unarmed strike damage to the creature you are grappling.
- You count as one size larger when a creature tries to swallow you. If it does, you can use your reaction to make an opportunity attack against it.