| Richard sands 814 |
To my understanding a crit is double the normal damage dice. Deadly adds the deadly damage die on top of that. Master quality weapon just gives +2 Item Bonus for normal attack rolls EDIT: and I guess lets you add 2 deadly die on a crit in addition to normal crit die. .
Keep in mind i'm going off of a different forum post for this as I had the same question.
EDIT: Okay I see what page you're looking at. so it's either 4 d6 with a crit or 2d6+2d8. I'd definitely look for an errata post and add this if someone else hasn't.