dear author please take care of your health and rest then you can write this story. and again I States my opinion please rest and get healthy before you do anything.
He should drop by the Percy Jackson world as well and pick up some of their magical metals, like celestial bronze, Imperial gold, stygian iron, and bone steel. Maybe get some water from the River Styx and steal Zeus Master bolt to fuse with his sword, since stealing it seems to be pretty easy lol.
Xianxia world has alot of resource, but not suitable for this fic I think.. But magic.. More magic... Sacrifice a few loli for the old vampire tutor on second true magic... 😂 😂 😂
And hope you don't get caught..