Updated (and renamed)
giant stag and added
Eucladoceros based on my earlier conversion, as Cleon suggested.
The
Eucladoceros needs a few tweaks.
Were'nt we removing the Dire from it, thus changing the Will save to +2?
It should have "Larger versions of eucladoceros are known to exist, and use the
dire stag statistics.", not "giant stag".
The skills have a "Dire Stag" which should be a "eucladoceros".
The first paragraph of the Dire Stag could do with some tweaking, how about:
Dire Stags are giant deer, often with a prehistoric appearance. They are often oversized versions of eucladoceros, the "bush-antlered deer", named after the bush-like array of spikes on its enormous antlers.
Also, if its "over 10 feet" and "at least 7 feet" I'd suggest adding an "or more" after the weight, since the 1,200 pounds was based on those dimensions and you're implying it's often bigger.
A dire stag is over 10 feet long, stands at least 7 feet tall at the shoulder, and sports a rack of antlers 6 feet wide. It weighs 1,200 pounds or more.