Lusserina and Lu Bi were within his mental energy world and Zhang Yi disguised himself as a Forest elf this time, he was just like he met Saphielle the first time, after disguising himself Zhang Yi became invisible and teleported into the territory of Forest elves.
He teleported close to the city where the big tree that had the natural seed treasure that Zhang Yi had was, the tree was close to dying after almost 500 years, big trees like that could live for hundreds of thousands of years in the wild for because of the vast spiritual energy.
Elves have existed in this world for many generations and it was not known exactly how many years ago that world existed, but it was certain that this tree should have died long ago because many similar trees died thousands of years ago.