The Pharaoh Stalker, also known as The Crypt Stalker, is an upgraded version of the Yellow Stalker, It is a boss stalker just like the Armored Stalker, The Crypt Stalker is red-orange, It has an orange mouth instead of bloody red, it also has a Dark Eye in the middle, it also has six spider like legs, It is found in the Mini-Boss Room of The Nameless One Desert Temple (maybe?).
It still appears in Arena tho, It was there in the Desert Level of Blocky World, But then was replaced by a fucking golem in a future update.