Alright, I have a question regarding a certain class of stunts.
The Killer Blow stunt goes as follows:
Killer Blow: Add 3 to the damage of a Fists attack on a successful hit, once per scene, for a fate point. This stacks with any other damage-increasing stunts for Fists.
Certain Catches can only be satisfied by attacking with a Weapon:3 or higher; anything below that is weakened/blocked by the Toughness powers.
Normally, a Fists attack is a Weapon:0. Certain stunts, such as Lethal Weapon,
Lethal Weapon: Your hands are lethal weapons. When using Fists to strike an unarmored opponent, you are considered to have Weapon:2. Against opponents with Armor:1, your Fists attacks are Weapon:1. There is no benefit against more heavily armored opponents.
allow for Fists to have Weapons ratings greater than 0.
Thus the question is: Do the Killer Blow and related stunts of "Spend A Fate Point to add extra damage" apply that damage to the shifts from the attack roll, or does it apply it to the Weapon:X rating, increasing it for that one attack?
(and, no offense, please don't suggest "Take Claws/Inhuman Strength/other supernatural powers"; this is a question on stunts, and whether a Pure Mortal with the right stunt selection can do with his bare hands or a shotgun something that you'd need a sledgehammer or artillery to do--satisfy the Catch of "Weapon:X or higher".)