How to go dungeon?
The first dungeon will be made available to you after you complete the lvl 30 storyline. After that they will be made available every 10 levels until between 70-80 where there’s like 3 dungeons. You’ll need a group of 5 people to play through the story of them. After you play through the story the explorable mode of the dungeon will be made available. This mode is much more difficult, but the rewards are greater.
Thank you very much =)