Coffin

Upon entering the garden, Xiao Lin's eyes widened. This garden was like a different world, the sounds and smells from the outside disappeared immediately. It was extremely quiet there and only their footsteps could be heard. 

The castle gate was not locked, nor were there any traps. Xiao Lin and Lilith managed to get in easily and were immediately assaulted by a bright flash of light. The entire interior of the castle was filled with white crystals, including every inch of the walls and ceiling, which were adorned with diamonds and jades. Standing inside felt like they had entered a dream-like crystal palace.

The castle was very spacious and simple. Other than a huge hall, there were no other rooms or hallways. At the end of the hall was a black coffin, which contrasted heavily with the pure and holy hall.

Xiao Lin and Lilith exchange glances, their mutual shock evident. Their gazes then turned back toward the coffin as the two of them walked closer.