It reminds me of a sapling from the world tree that's growing in her dantian... And her dantian looks like a galaxy so dies this mean she can have her own little world besides her space from being a mystic cultivator?
Hahaha that sounds kind if amazing, a starry sky dantian. I almost thought, "Wow, her dantian is as pitch black as her personality", but alas, she got a starry sky...and a sapling of a tree.