Die Instantly, the More You Die, the Stronger You Become

Every magic school graduate will acquire an original skill. However, as an inferior student in the school, my skill is instant death, not to let the enemy die, but to kill myself! And it is actually passive, it must start automatically when dying. No, wait, that means no one can kill me? ! Maybe this skill is useful! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.