The Ancient Training Ground, which can be entered once per day, is the XP farming location in game.

To enter the Ancient training ground, simply tap the Recommended Event on the top right part of your screen then choose Ancient Training Ground under the Get Stronger tab on the left.

This will bring up a menu with the details of the Ancient Training Ground. Then simply tap Go to enter from the World Map.

Inside the Ancient Training Ground, hordes of monsters will spawn around the edges of the map every once in a while.

Various buffs and powerful temporary weapons will also spawn near the center area of the map to help you defeat the monster hordes.

Upon reaching the daily XP limit, you will get a pop up asking if you would like to leave the training ground.

There’s also a secondary option to Increase XP Limit by spending some crystals.

You may also choose to enter the Ancient Training Ground with a team. This option will automatically match you with players of similar levels if you aren’t already in a team.

Monsters’ level in the Ancient Training Ground is based on the captain of the team. Team members whose levels are too low or too high will be notified upon entering, and may choose to proceed if they find the difficulty/rewards acceptable.