Warden Potion, See Sound Through Walls, Cave Finder

My idea is a new potion that allows you to see sound. To be more specific, you can see anything that makes noise, even if it is behind walls and blocks. 

The main purpose of this is to help players find unexplored caves. Any mobs that are within distance that you can hear, will gain the glow status effect. This will allow you to see mobs through walls. Similar to when you shoot mobs with spectral arrows. Other noises like water or lava will also gain some form of similar effect that you can see through blocks.

The main functionality of this will be to help players find nearby unexplored caves. Mobs spawn in the dark, and usually people place torches in caves they have explored already. So by being able to see near by  mobs through the walls, it helps you find new caves.  

The potion can be made with a new item dropped from the wardens. It will sort of mimic how the wardens rely on their hearing to see.

This solves giving Wardens a really useful unique item drop. Probably its antennae or something representing the wardens good hearing. 

Mob trap players will especially love this potion because it will help them find caves to light up to increase the efficiency of their mob farms. PVP players can use it to prevent players from sneaking up on them.

Maybe adding fermented spider eye to it will create the blindness effect?