Sorry for the lack of audio, recording picked up the music I was listening to while playing.
The Legend of Crimson Fox Achievement entails defeating any boss in solo mode on Nightmare (or higher) using only Li's Spiritual Flame skill. If you are trying to get this achievement, I recommend going for any skills that increase Spiritual Flame's damage, capacity, or cooldown.
![](https://s2.save4k.ru/pic/qf0uVQzxvFw/maxresdefault.jpg)