Shreaking skulk mob

I feel for a unknown grouth found in a long forgotten ancient city buried in the bottom of the world it should have more skulk monsters and i have an idea for one the shreaking skulk/shreaking warden uses ECHO LOCATION and the sence of smell to hunt down its prey. it would be summoned if you activated the skulk shreaker multiple times it could have a 50% precent chance of spawning the shreaking skulk and a 50% chance of spawning the warden. it is based off cave sound 4 kind of like how the warden is based off disk 11. The shreaking skulk uses echo location it will let out a big SCREECH wich would in tern bounce off the cave walls come back and rattle the bone like plates on the side of its head telling it that you are there. To sneak around it you would have to be out of its line of screech or if there is no where to hide you could stand completely still and hope it mistakes you for a piller or a  stalagmite iff this is too over powered or is too complex to code i understand thank you for making this wonderful game bye (=