MORTAL KOMBAT X STORY SPOILERS BELOW
In Mortal Kombat X's story, Johnny Cage gains his patented green armor when Sonya was in trouble.
Later in the game, and again, spoilers to the story, his daughter Cassie gets his green armor when Johnny is in trouble. She even mentions that it runs in the family.
I always thought that this power was something that Johnny learned, not something that he was born with. Cassie did not go through the same martial arts training that her father did. MKX also doesn't explain what this power is.
So, what is it and why does Cassie have this ability?