New Deep Dark Mobs And Block/s

Imagine a mob that dosent make sound but faint when attacking, it is also blind and uses smell and sound to find its prey. Perhaps something of a spider that drops from the- ceiling/high above without the player even hearing it. The mob attacks with blindness and/or silenced which causes the player to become temporarily deaf/impaired. Of course- only for a little while as the warden is already enough to deal with. This mob will only drop if it hears sound or if a player is close enough it will smell out the individual and attack. Let's say when a player runs away from a warden they'll have to watch out for this new mob aswell. This mob may drop and item which can be used to make a block that- completely blocks sound even when breaking and walking over it. To make this block it would need the item from this new mob, maybe string or wool. With string using 8- Pieces to surround the item from the new mob which let's to craft 2 blocks. This block can be used to traverse through the deep dark without making sound and when using skulk- sensors for redstone, they block out any unwanted Redstone item to power. Another item could be a light/torch and when your within its area blindness is slighty reduced by- a few blocks. Maybe a potion the reduces blindness could be a thing, and the item needed comes from the new mob. That's all thank you and please consider this idea. :)