1, first come to the upper right corner of Blood Moon Island, where there is a hidden secret door leading to the underground.

Secondly, the basement is a place similar to a library. This place is for Sanguang. Obviously, there is a secret door next to it. Just look for the office carefully, and you will pass.

3. Finally, you will pick up an unusual sword, which is another part of tarquin's sacred object. When you go out later, you can give it to tarquin, and the box next to you can take another pyramid.