Damien felt immensely guilty since he knew Luna got struck by Yohr's attacks because she was busy protecting him, and she didn't have the energy to counter them at the same time.
Yohr sinisterly laughed, seeing that he was finally able to bring down the Ethereal One, although she was not dead, and he wasn't disappointed since he can't let her die…not yet anyway until he absorbs all her powers and takes over her place as the supreme ruler.
However, the price he just paid now to bring down Luna was a very costly one since he went all in and ended up destroying his own cultivation base to the point he was way weaker than he was before Damien came here.
But he didn't feel that disappointed since he had the hopes of recovering all his cultivation and even more after he was done absorbing whatever there was inside Damien's soul and then the Ethereal One's.
