Gray render

A gray render is a large, six-eyed creature with a hide similar to that of a rhinosaurus or elephant.

Description
Gray renders have thick gray hides and heavily muscled shoulders. They are nearly ten feet tall, bipedal, and have six yellow eyes, three on each side of their heads. Their feet and hands are clawed, and they have crocodilian mouths.

Gray renders reproduce asexually, and only have one child per generation. They can be very protective and territorial.

Abilities
The gray render is able to claw and bite at its target. They can also attempt to grapple the target. Their armor class is 17.

In order to become Grand Mistress of the Grey Hunt, Vex'ahlia had to meditate, calling upon Pelor at the Sun Tree for a vision of the creature she needed to slay. She had a vision of a large, gray, six-eyed creature, and tracked it down to the woods outside of Whitestone, where she slew it with the help of Trinket. She brought back the hand as a trophy, and Percy was able to identify the creature as a gray render.

Trivia
While gray renders existed in previous D&D versions, they had not yet been published in 5e materials at the time that aired.