These are the creatures in The Elder Scrolls 1: Arena. Choose one.
Lizard Man
Here is what the Arena Manual says about them:
Once thought to be distant cousins of the Argonians, it was soon evident that these Lizard Men had nothing Human within them whatsoever. They are a race of carnivorous reptiles, whose use of language stretches only far enough to communicate the location of their prey to the rest of their hunting party, which then move to attack and feed.
Orc, Normal
Here is what the Arena Manual says about them:
Orcs are a larger version of Goblins. Indeed, Scholars have often speculated that these two creatures are somehow related. Nevertheless, they are stronger than their cousins, and very dangerous, often equipping themselves with weapons found on their opponents. They are not overly intelligent, but are cunning enough to stalk their prey and set up ambushes.
Skeletons are undead creatures, once Human, now animated by some forces either magical or supernatural. They usually are set to guard certain places, such as burial crypts or vaults. They have a single-minded purpose, and will track their foes until the hapless victim is found and destroyed. Skeletons are resistant to edged weapons.