Minecraft wiki entry for Exploring_an_ancient_city, associated text: Use your Potions of Night Vision to see without having to place Torches (as that potentially alerts sculk sensors and shriekers). Torches, however, are useful as a last resort if you run out of Night Vision potions or are under the Darkness effect, so use your night vision to identify spots where a sculk shrieker or sculk sensor will not notice the sound, and place torches in those places, so that you can see by their light later. There may be some areas where it is extremely difficult to get through if you have run out of night vision potions or have the darkness effect and you should simply avoid these areas.