Life and Death Battle means fighting to the bitter end!
"Oh my gosh! What kind of grudge exists between the top person on the 'Heavenly List' from the Anderson Manor in Ridge South, 'Kash Lynch', and Mr. Barnes that they're having a life and death battle?"
"The last time he challenged Mr. Barnes, he didn't mention it was going to be a life and death battle... Announcing it now, if Mr. Barnes isn't confident, he might likely back out."
"It's so ruthless! To engage in a life and death battle."
...
When the people throughout the Capital City of Fletcher Kingdom snapped back to reality, they were abuzz with discussions.
Many began to worry whether Wyatt Barnes would still participate, upon learning that tomorrow's battle was a 'Life and Death Battle'.
A Life and Death Battle — deciding life and death!
It's not something to joke about.
A person's life, you only live once, and once it ends, it means death and the end of one's path.