(Sword 3) The Account Character Transmigrated

Whenever a new sect came out in Jian Wang 3, Jiang Yiming would join it to experience the joy of being the version's top-tier class. He had now made a full 20 characters. One day, when he logged in, every character across all his accounts had vanished. After being told that they had gained sentience and gone off to live their own lives, Jiang Yiming found himself bound to a character-recycling System with appallingly low standards, like it had never been beaten up before.

And so began an exhilarating and perilous journey of quick transmigration.

A crossover, all male characters, and more than one sect in each world. There may be wuxia crossovers, Grave Robbers' Chronicles, the apocalypse, interstellar settings, cultivation, and more. That's the plan, anyway, but I'm incredibly lazy, so I might not finish it.

Theme: What kind of theme could this possibly have?