La grande osmose

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. Accord is an agreement or conformity, whether it be of concepts and factsor between groups and nations. A principle befitting the Path of Harmony.