Evil Beasts, Powers of Grayskull

Tyrantisaurus Rex: Most Terrifying Dinosaur in the land of Preternia (1987)

Although I missed most of the 1987 wave of Masters of the Universe figures, I did happen to catch Tyrantisaurus Rex. A remember being at a friend’s house, and he showed me his new purple cyborg dinosaur that could shoot a green drone from its belly. At the time I had moved on to G.I. Joe, but I thought it was a pretty cool looking toy. I actually happened upon the figure again, years later at a university reptile show intended for kids. There was a table full of dinosaur toys, and there in the heap was Tyrantisaurus.

Design & Development

The earliest design artwork for a MOTU T-Rex comes from Alan Tyler. His take on the concept is quite different from what followed. The design below doesn’t have any external cybernetic parts. Aside from the pop out opening in the back, it looks like a fairly realistic tyrannosaurus. The “drone” is actually an organic creature instead of a mechanical one.

Image source: The Power and the Honor Foundation

At some point the concept was turned over to David Wolfram. This was actually David’s first project for Masters of the Universe. As he explained in my interview with him:

I was in my last term at Art Center College of Design, and had a fairly light schedule, so I checked into freelance opportunities offered through the job placement department at AC (I can’t remember exactly what they were called), and saw an opportunity to work on a project for Mattel.

I went to Mattel, and met with Martin Arriola to discuss the project, which happened to be a dinosaur project for MOTU. Coincidentally, at my drawing board I had a small black and white TV, and as I was working on my school projects, I would always watch the afternoon MOTU cartoons, so I knew the property, plus I had a lifelong interest in dinosaurs, so I jumped at the opportunity. I worked on this project on a freelance basis until graduation, then I started working in-house at Mattel as a temp, which is the back door way that many people end up working there.

Here is my concept drawing for Tyrantisaurus Rex. It originally started out as a heroic vehicle, but marketing begrudgingly made the decision that it would be better suited for Skeletor.

David Wolfram
Image courtesy of David Wolfram

The above illustration by David Wolfram, dated November 21, 1985, is very close to the look of the actual production toy. The only obvious difference is the color of the gun, which is gray in the concept art.

Production Toy

We can see the translation of the concept design into mass-produced toy below, first in the cross sell artwork (a nearly photo-realistic drawing of the figure) and in the mass produced toy below.

Tyrantisaurus Rex cross sell artwork. Image source: The Art of He-Man
1987 Mattel retail catalog. Image source: Orange Slime
Source: He-Man.it Forum

A hatch on the back of the figure opens up to allow an action figure to sit. A hatch on the stomach stores the “Dyna-Drone” (a wind-up spinning toy), which can be launched from the figure’s belly. There is a removable blue gun that attaches to the dinosaur’s right shoulder, and the mouth is articulated.


The box art on the front of the packaging was illustrated by Warren Hile, who also worked on the Bionatops and Turbodactyl packaging:

I don’t know who did the artwork on the back of the packaging, but I’ve transcribed the backstory:

Travel back in time through a secret time portal-and discover the ORIGIN of THE POWERS OF GRAYSKULL! Learn how He-Man became so strong! And explore the magical world of Preternia – home of HE-RO, the Most Powerful WIZARD in the Universe!

Monstrous dinosaurs and fierce giants – both good and evil – struggle violently for control of this strange & hostile land! The dinosaurs in the time of HE-RO – Tyrantisaurus Rex, Bionatops and Turbodactyl – each posess a fantastic mechanical power. Can HE-RO master all the good magic of the Ancient Wizards and protect future Eternia from forever falling into the claws of evil?

Look for He-Ro and the Powers of Grayskull coming your way in 1987!

He-Ro was never released of course, although a replica of the unproduced figure will be available in 2019 from Super7. The giants mentioned in the text were Tytus and Megator, which ended up being offered for sale in Europe in 1988, but not in the US. Tyrantisaurus is depicted on the back and front of the box as being ridden by King Hiss, which was also the case in the minicomics, as we will see later.

There is also this profile of Tyrantisaurus Rex on the back:

Tyrantisaurus Rex:
Profile: Most Terrifying Dinosaur in the land of Preternia
Special weapon: Hidden Dyna-Drone bursts out of Belly! Bowls Over Enemies!
Origin: Related to the Ferocious Tyrannosaurus Rex from Pre-Historic Earth!

The 1987 Style Guide had a similar description of the character

Comics & Stories

The Powers of Grayskull: The Legend Begins was to be the first of a “3 part saga.” Unfortunately with the cancellation of the line, the next two parts were never published. In the story, Skeletor followed He-Man and Sorceress back in time to ancient Preternia, where he allies with King Hiss and causes trouble. A battle ensues, with a disguised He-Man riding Bionatops and King Hiss on Tyrantisaurus.

Source: Dark Horse

In Journey To Preternia, in the 1987 Spring issue of MOTU Magazine, Skeletor and He-Man accidentally travel through a time portal, and end up allying with their respective dinosaurs and hashing things out in a predictable way. In this story, there are multiple Tyrantisauruses.

The Summer 1987 MOTU Magazine also had a story featuring multiple Tyrantisauruses:

Tyrantisaurus is colored green and presented as belonging to the Evil Horde in the He-Man newspaper comic series (thanks to Dušan M. and Øyvind Meisfjord for the heads up!). Once again we see multiples of the fearsome cyborg T-Rex:

The creature is also green in issue 3 of the 1987 UK MOTU comic series, again with a green color scheme. In the story, Tung Lashor refers to it as a “Warsaur”, which might be an early working name for the creature (thanks to Petteri H. for the tip).


Tyrantisaurus was featured on two covers of the US Masters of the Universe Magazine, which were illustrated by Earl Norem:

Source: He-Man.org
Source: He-Man.org

William George also illustrated the dinosaur in his Preternia poster:

Source: Jukka Issakainen

Errol McCarthy illustrated the figure for a T-shirt design (again in green, like the newspaper comic):

Source: He-Man.org

Tyrantisaurus is one of the cooler looking beasts of tail end of the line. Because he was produced in limited quantities, he’s quite pricey these days, but a must-have for any aspiring Preternia collector.

Image source: Grayskull Museum

Tyrantisaurus in Action

Øyvind Meisfjord has kindly shared the following image and videos of the Tyrantisaurus Rex in action:

2 thoughts on “Tyrantisaurus Rex: Most Terrifying Dinosaur in the land of Preternia (1987)

  1. Great writeup, as usual! This is a special one for me for a couple of reasons. My two big obsessions throughout childhood were MOTU and dinosaurs, so the relative lack of some dinosaur-themed vehicles and mounts was something I found baffling. The Bashasaurus was awesome, but there was potential for so much more! I was only aware of the Preternia dinosaurs from the POG minicomic, which came packaged with one of the final MOTU figures I got back in the day. (I forget which one.) I never saw an ad for them, and never ran across them in a store. I lucked out and found a Tyrantisaurus at a garage sale in 1989. (I remember the specific year because I was thinking about the upcoming Batman movie when I came across it!) The gun was missing, but everything else was present and in working order, including the drone, It’s one of the few of my vintage MOTU toys that was part of my actual childhood collection, and it occupies a place of honor in my display to this day. He’s currently standing alongside last year’s Colossal T-Rex, which I view as a descendant of his. 😉

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