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The Yin-Yang mechanic doesn't work at all. I eliminated the requested targets, the quests were marked as completed, and that's it. There's no interaction with the dungeon. Previously, when I was in the dungeon, a message appeared saying that keys were needed.
As I understand it, the author intended that to open the dungeon, you need to kill 2 stacks of dragons on the islands, after which you can open the dungeon. But it's not interactive... and it's not important anyway, as everything can be cleared, and the author got confused with the order of the scripts, but the map can be completed.
Всегда играю на Г.