Death: You Can Upgrade Your Zanpakutō by Defeating Monsters

Lin Chen, who traveled to parallel time and space, obtained the Death System. "Upgrade your Zanpakutō to Ryuken Wakahu, Tensuo Zangetsu, Kyoka Suigetsu..." Fighting monsters unlocks all Zanpakutō abilities into one. Learn all the ways of ghost, sword, and shunpo. Crush everything, destroy all injustices, power, wealth, and love are all in my hands. This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.