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Instead of using a weapon to make a melee weapon attack, you can use an unarmed strike: a punch, kick, head--butt, or similar forceful blow (none of which count as weapons). On a hit, an unarmed strike deals bludgeoning damage equal to 1 + your Strength modifier. You are proficient with your unarmed strikes.

If you assign all 7 Orcs Lv60 + All Upgrades to your defense, it will come out as a 570 Rating, anything over that indicates something unlegitmate.