It looks like the check box for Warriors Arm is adding Luck x2 to the Crit tables but it should only be x1 because the normal luck gets added once already by default. This birth auger is not supposed to add x2 luck to the roll it just effectively does that at first level, but when luck changes that changes too. For example my cleric has +1 luck and Warriors Arm, the current match is giving him +3 on crit tables but it should only be +2.
