Double Muscled

You have hulking muscles.

When you take this mutation, you add an extra die to your strength. (d4 --> d6 --> d8 --> d10 --> d12 --> d12) In addition, whenever you get a raise with a melee attack, you may choose to reroll a 1 on a damage die, you can do this once per turn.

Your strength die may not go above a d12 using this mutation.