Necrosaro's Castle is the final dungeon in Dragon Quest IV.

It appears as a shadowy castle in the centre of Hell, inaccessible to all non-monsters due to a magical barrier that has been erected around it. The party must defeat Saro's four closest henchmen (Anderoug, Infernus Shadow, Gigademon, and Radimvice), who are maintaining the shield, before they can enter.

Pizarro does not actually live in the castle, but on top of a mountain that can only be reached via the castle.

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