I've never encountered such a monster! I'm curious to know its ID!

I remember seeing such a monster in one of the custom scenarios (Power of the Elements, if I'm not mistaken). It was the leader there and had colossal stats (it was called the Elemental Lord). The map has a mod embedded that replaces wolves with these creatures. I didn't delete the map after completing it, and in the scenario about resurrecting Nicholas (also a custom scenario, I don't remember the name), instead of wolves, Elemental Lords appeared, but with the stats of a wolf.