C903 You're Dead
The Heart Devour of Thousands of Ghosts was the ultimate skill of the Six Yin Wind Evils.
It could even be said that the ten thousand ghosts devouring the heart was equivalent to one of their forbidden moves.
Because, once they used the Heart Devour, there would be some repercussions. So, unless the circumstances were special, under normal circumstances, they wouldn't use the Heart Devour