Converting prehistoric creatures

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I agree - with its size and splayed legs, I don't think its Dex should be any higher than 8 or 9.

Edit: Here's a preliminary stat-block I've come up with:
Edit 2: Oops, missed Shade's post, I'll just leave the flavor text.

This bull-sized creature is built like a barrel. Its thick body is supported by stout, splayed legs, and a short tail lashes behind it. Its most distinctive feature, however, is its head: one the sides of the face and above the eyes, it has horn-like projections, causing it to resemble a reptilian moose.

Estemmenosuchus is a dinocephalian, a type of primitive therapsid (“mammal-like reptile”). Like some other dinocephalians, it has bony ornamentation of the head, leading adventurers to refer to it as the “crowned crocodile.” The estemmenosuchus' ornamentation resembles the antlers of a large deer. Estemmenosuchuses use these antler-like projections to compete by head-butting and pushing.

An estemmenosuchus is 10 feet long and weighs one ton.

Combat
Estemmenosuchuses, especially males, are aggressive animals and will charge with head lowered into anything they deem to be a potential threat (basically any Medium or larger creature). In addition to their headgear, they have large canine teeth, making bites from estemmenosuchuses potentially deadly.


Do we want to give it any special attacks, like deadly charge? How about ferocity?

Dangit, my USB thumb drive just stopped working AGAIN, so I lost all my work on my dinosaur book project since I backed it up on December 21st >_< I hope that either it'll start working again miraculously or my dad can somehow recover it....even if neither of those happen, most of the stuff I lost was converted creatures from this thread, so it shouldn't be too hard to start over...
 
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Added to Homebrews.

Give it a swim speed? One of the images on Wikipedia shows it swimming, but I can find no other evidence to support this.
 

This site says that "the remains of Estemmenosuchus have been found in a channel flood deposit, indicating that they probably frequented lowland and marshy areas." They might have taken the occasional dip...maybe they're like hippopotamuses? Big, ungainly, aggressive creatures with big teeth, living near water, primarily herbivorous but won't turn up their nose at carrion.
 
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Let's give it deadly charge with its butt attack, but I'm not a big fan of giving it a Swim speed. I do like the idea that they eat occasional carrion.
 

If we don't give it a Swim speed, I think it deserves a racial Swim bonus of +4 or so. Let's add marshes to the environment.
As for deadly charge, how much damage should that do? Double?

How about its feats? I'd suggest Power Attack and Improved Bull Rush.
 

+4 Swim bonus and marshes sound good to me. Double damage on deadly charge is standard.

I'd prefer Endurance and Great Fortitude for the feats, but like Imp. Bull's Rush as a bonus feat.
 

Endurance, Great Fort, and Imp Bull Rush sound great. Skills, since we already have a Swim bonus, should probably Spot and/or Listen.
 


Spot 4, Listen 3. 5-10 HD (Large), 11-12 HD (Huge) because, why not?

Deadly charge is usually double base damage plus 1.5 times Str, so 2d6+10.

CR 3? It's better than a bison, but worse than a dire boar.
 

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