Once he arrived at the outer cave, Heizen extracted the Silver Moon Grotto into the token with a thought.
The way this artifact worked was similar to the mana ring, but it was larger and could hold living beings. It was almost similar to the spirit beast token in a cultivations novel.
After keeping the artifact, he quickly returned along the lotus path, outside of this sealed area. Just like he thought, he didn't encounter any obstacles along the way and didn't even need help from Luna like before.
When he arrived outside, he swiftly released Luna from the Silver Moon Grotto, as she was urging him quite passionately. He could understand her impatience.
"Swish," the token glowed faintly and Luna appeared on the outskirts of the forbidden forest where Heizen had previously fought Damian.
"Finally, after so many years," Luna said excitedly, clearly emotional.