So, when it is all said and done, you have three dice to choose your BCF result from?

I played it as you either pick one of the dice in the attack roll, OR THEN you roll the d6 for BCF, but I'd be interested to hear if you could still roll the 3rd die and then choose.

Ignoring whether or not you get 3 dice rolls or 2, even using your dice rolls I think is an excellent option. Most of the time, if you hit with an attack, you're probably going to have a 4+ on those dice. So for me this is a great pick to put on someone who has penetrating damage but needs a little more oomph from their sword.

s017 Grasscutter
[E] EFFECT: Blades/Claws/Fangs. When this character uses it, you may instead use one of the dice in the attack roll as your d6 result.