I Use the Game System Ability to Travel Across Different Worlds

Su Yi accidentally traveled to a different world where magic and fighting spirit coexist. Everyone here knows magic and fighting spirit, but Su Yi, as an earthling, is like a Muggle in this other world. However, all time travelers have special abilities, and Su Yi's special ability is to have a game system. Su Yi can upgrade, strengthen various attributes, learn various skills, magic, and change jobs by completing tasks and defeating monsters. "Ding! The experience value reaches 100%! The level reaches level 10! You can choose to change your profession!" "Ding! The experience value reaches 100%! The level reaches level 50! You can strengthen your professional abilities! Obtain special and powerful skills exclusive to your profession!" "Ding! The experience value reaches 100%! The level reaches 99! You can break through the boundaries!" "Tip! You can get the reward elixir of death when you reach level 999!" What a Muggle! Watch me use my game system abilities to reach the peak of my life in a different world! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.