Tatzlwurm is a mission boss from Final Fantasy XI: Rise of the Zilart. It is encountered alongside Yali in Windurst Mission 9-2: Moon Reading, as the Final Boss of the extended Windurst campaign.

Ajido-Marujido appears to assist the party in this phase, and must survive to complete the mission. This is problematic, as Tatzlwurm can nearly kill him in one hit, while Ajido-Marujido can very easily draw attention to himself with his Ancient Magic spells. XI