First, if it's only a graveyard, then if human players (especially warlocks) in the league will be very clear, they should need the same time to find the calling circle as the questioner when they are at 10 level. After going down to the basement, the BOSS who was finally killed usually forgot the Oracle orb, which is the most valuable thing. The specific method is as follows:
When you enter the basement, you can only see a square circular road with stairs on both sides when you walk around. Please look at the middle wall on the down side of the stairs. If you are careful, you will find that there is a way down ... which is very lewd. As a human warlock, I have been looking for this road in a similar map for a long time when I am doing a professional task of 10. After that, follow this idea and look at the wall when you can't find the way.
Addendum to the cemetery: usually, you don't brush the cemetery. If you are lucky, you will find a rare elite BOSS (one in the front four corners of the basement and one at the entrance of the basement). The way to distinguish is that if it is a rare BOSS, there is a silver dragon around his head instead of a golden dragon or not (the silver dragon is also a symbol to distinguish rare monsters, so those monsters are commonly called silver dragons). It's rare for BOSS to drop something good.
Second, if we are talking about the bloody main task, besides the South China Sea, there is another task that is often overlooked. First, go to the sentry tower above the desolate place to pick up the task of "killing 30 skeletons". The skeletons are at the bottom of the map (it's a long journey ...). When you return to the sentry tower after killing, NPC will ask you to find a person in the South China Sea. He is on the second floor of the hotel. After the dialogue, the third step, that is, the bloodless main line, requires you to remove three areas outside the cemetery to kill BOSS.
If you are going to do this task, then you should go to the damn library first. Like the cemetery, the library can be entered without a key, and it is located opposite the cemetery (that is, the door on the right after entering the bloody monastery). Remember to take the key behind when you kill the last BOSS (other copies will use this key in the future, pick up the binding, one for each person). Then I drew two armories and cathedrals to be opened in the middle.
Addendum of the Church: After killing the famous phrase "Double BOSS" (Come back to life, my soldier! Fight for you, my lady! .....), or before killing, go to the house on the right and clean up the monster. There is a torch that can be pulled on the wall, which opens a secret door in the room, and there is an immortal BOSS behind it.