Fantasy: My System Can Absorb Other Systems

After a new life, Lu Changsheng was reborn in the world of immortality as he wished, but unexpectedly obtained the system? What! My system only has one function? It just eats up other systems. What a useless system! Lu Changsheng traveled all over the continent for 13 years, and finally on this day, his system absorbed the fourth system. What am I? To rise completely. Lu Changsheng immediately knelt down. "System dad, please take me to fly." "Didn't you say I'm worthless?" "You are young and ignorant, system dad, please." This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.