Remathilis said:I like your revision to my hypothetical feat though, so lets finish it off...
Killing Blow [General]
Requirements: Weapon Focus (any), Bab +9
Benefit: Once per day, you can make a special killing attack as a standard action. You must declare you are using this feat before you make your attack roll. You make one attack at your highest attack bonus, but with an additional -6 penalty. If you hit, you deal your normal damage plus 1,000 points of additional damage. If you miss, your attempt is wasted for the day. This feat has no effect on creatures immune to critical hits.
Special: a fighter can take Killing Blow as a bonus feat.
The pro- save or die people would throw a gasket at their game if their DM had an NPC with this feat and used it against their PC.
DM: "He hits. You're dead."
Player: "What do you mean I'm dead?"
DM: "He hit you for 1032 points of damage. You're dead."
They would blow a fuse.

But, they love save or die. <shakes head>