Those who have progressed a short distance through Master Li's tasks can begin this by talking to the Climber beside the Graal City Cathedral. Having progressed further through the storyline there is also a 2nd method for unlocking entry.
The Climber's Cave is a remake of one of Graal's first quests, but has however been revamped and extended to include new levels, features and a boss fight. The is a side quest to the main storyline and is not required to be completed, and is accompanied by the introduction of an unlockable Trading Card. It is planned to implement more unlockable Trading Cards within and around quests within the near future.
Furthermore the server is now using an enhanced tileset, with various objects now appearing more high-def.