How do you unlock necrocavern in aqw?

To unlock the Necrocavern in AdventureQuest Worlds (AQW), players need to complete the "Necromancer" questline from the Darkovia storyline. This involves defeating specific monsters and collecting items to progress through the quests. Once the required quests are completed, the Necrocavern will become accessible. Be sure to check for any updates or changes in the game's requirements, as they can vary with new releases.