無意義的成就

You can borrow a relevant unit from a friend for this achievement. You can run Difficulty 1 in Echo of War without spending stamina (after your 3 weekly runs). You can also run Forgotten Hall 1.

This achievement has no cultural references in the English and Chinese versions. It is likely specific to the game. Nihilism is a philosophical belief that all values are baseless and that nothing can be known or communicated. It is often associated with extreme pessimism and a radical skepticism that condemns existence. A true nihilist would believe in nothing, have no loyalties, and no purpose other than, perhaps, an impulse to destroy or farm chives.