Fatal Blow
A fatal blow is like a MKX X-Ray, just way way worse. It is used for combat (kombat) in MK11. All characters have one.
Example:
(In game party0
Player1: "Haha your health is low"
Player2: "Well how about I use my Fatal Blow"
Player1: "Well shit"
(In game party0
Player1: "Haha your health is low"
Player2: "Well how about I use my Fatal Blow"
Player1: "Well shit"