In previous game versions the Gorebull had multiple stages of Strength of the Land and Unrelenting Warherd. These were labelled Roman numerically. Each of the stages could be stacked by multiple Gorebulls each with a different one actiev because each stage had a different ability name. This triggered a nerf in a patch.

Since the game has been since patched, these skills have been reduced to a single skill.

However, now, those skills have retained their numerical assignment, though it makes no sense to be so.