Martial arts trainee (HB)

Your practice of martial arts gives you mastery of combat styles that use unarmed strikes and natural weapons, You gain the following benefits while you are unarmed  and you aren’t wearing  medium of heavy armor:

• Your unarmed strikes and any natural weapons you possess gain the finesse property
• You can roll a d4 in place of the normal damage of your unarmed strike or monk weapon. This die changes as you reach 11th level (1d6), and 17th level (1d8).