Unexpected notification message inside Rebirth

His opponent still had a scared shitless look on his expression as Meow Meow Cat Strike, pierce right through his chest until it was all the way to his heart, the moment his attack hit his opponent he immediately got notified by the game system that he dealt him a fatal blow Bernard couldn't help but look at it since he had been able to dispatch his opponent easily he had expected for such a thing to happen.

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You have dealt a fatal blow to your opponent!

You have dealt a fatal blow to your opponent!

"-99"

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{You have successfully defeated your opponent}

{You have been awarded 250 experience points}