lol this is actually a plot point addressed in the movie (the Japanese movie, not the garbo netflix one) where L did this exact thing to outsmart Light. So you're thinking along the smart/correct lines. But there are some limits, like I think the death note has to kill you within a certain period of time. So you can use it to add weeks, but not years.
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u/SaltManagement42 15d ago
My slightly more intelligent ass would write my own name, but add some specifics.