Do you need some monstrous voice for your creature?
my “monster screams” pack is what you are looking for!
](Monster Screams in Sound Effects - UE Marketplace)
57 voices and screams for your fantasy creatures, being them zombie, trolls, dragon, orc, ogre, animals or any kind of hellish monster.
You can hear the preview on soundcloud and you can even get a demo-watermarked preview of all the content by clicking here.
I recorded these sounds using my own voice and a zoom H4N portable recorder. In order not to scare my neighbours, I went away in my car and, having found a quiet location far from anyone, I started to scream and emit any kind of hellish sound… very funny! 
then I heavily processed the sounds with pitch shifter, equalizers, and compression… to get clips that will cut your mix and can be readily used in your game!