Minecraft wiki entry for Exploring_an_ancient_city, associated text: The most dangerous block in the ancient city by far is the Sculk Shrieker, as it is directly responsible for spawning in the wardens. So one of the most important things to do when exploring an ancient city, is to destroy all the sculk shriekers to stop that from happening. However, breaking them triggers nearby Sculk Sensors, which can in turn alert other shriekers nearby, not to mention that the Sculk floor prevents the player from placing Wool to occlude the sensors. Breaking all sculk shriekers without spawning any wardens is therefore, a very challenging task, but it is not impossible. To do so, the player needs to understand how the Sculk Shrieker works.