Realistic depiction of grey-skinned, reptilian theropod-like alien creature

Prompt

Realistic image of extraterrestrial theropod-like creature. It is grey-skinned, reptilian creature, standing at the height of 6'1 feet tall than an average human, that walk on four limbs: toeless hind digitigrade legs and three-jointed arms with two digits in front. The lower set of him arms are hanging on their chests, but him fingers are pointy and sharp and lack fingernails. This creature have a very flat nose with vertical nostrils, green eyes, and red horizontal slit pupils. He have dinosaur-like facial features, including a dark gray elliptical bony plate on the forehead and large, pointed teeth in both jaws; the rear section of him heads is enlarged; and the side section of him head is shaped like a right triangle with soft edges that look like big ears. While their oral cavities are fully purple and nearly magenta by leaving their dark gray lips attached to their dark violet gums. This yellow markings are on their skin, i.e., their inner upper arms, the upper side of their Redraw