You need to pull on all your equipment as soon as you can

A small tips about the 20 level quest Add to Bookmark - As we know that when we get in 20 level. We need to finish a quest to change our class. This quest asks us to beat ourselves? Right? The one who get the same property and more hp. Now I found a best way to pass auds gold through the quest, that's quite easy.

First, when you get the key, you need to talk with the NPC, to get in the labyrinth to kill another yourself. So, before you get in the instance, you should take off all of your equipment, and don’t use the book (Most important).

And as soon as you get in the instance, you need to pull on all your equipment as soon as you can.

You will meet yourself with not equipment only can bit you by fist. Then after a few turns, the mob will run escape.

Finished the entire mob, system will ask you to walk across a blue light. Then you should take off all the equipment again.

When the darkness changes to the light (YOU will meet a group of mobs. but you can kill them easily). Then you should pull on all your equipment, and use the book, then you will find 20 level quests it’s quite easy! Hope that would help you, I found the tips in a Chinese site.