How do you unlock necrocavern quest in aqw?

To unlock the Necrocavern quest in AdventureQuest Worlds (AQW), you need to complete the "Necropolis" storyline. Start by visiting the town of Necropolis and complete the initial quests available there. Once you've progressed through the storyline and met any level or quest prerequisites, the Necrocavern quest will become accessible. Make sure to check for any specific requirements or items needed to fully unlock the quest.