Roll a 1d10

1-9 Bone Claws
10 Metal Claws

Roll a 1d10

1-9 Retractable Claws
10 Non-Retractable Claws (-2 Dexterity)

Your character has claws. The claws may come from the fingers or the knuckles (player's choice.) Bone Claws change a punch into 1d6; Metal Claws change a punch into 1d8.