beast_gts wrote:No, it means the attack doesn't do it's normal damage in addition to the mortal wound.
Exactly.
A Mortal Wound never rolls a wound or save roll as per the core rules, but they clarified it in a lot of new abilities.
The attack sequence for this single attack ends.
You roll 18 dice, all natural 6s are mortal wounds. Continue with the rest of the dice that hit, but weren't natural 6s, and make your wound rolls.