Complex sentence: The Alice is very powerful and can be used as often and as much as desired, but the more often the Alice is used the more the user's body deteriorates and life span shortens, and eventually the user will die an early death.
Split into simpler sentences: The Alice is very powerful and can be used as often and as much as desired. However, the more often the Alice is used, the more the user's body deteriorates and life span shortens, and eventually the user will die an early death.