Auto-translated
But it's obvious that in the editor and manuals, it's only attributed with the property of "increases morale by +1".
The artifact is located in a row (in the editor) among the treasure class, and it follows the order: three artifacts for luck, three artifacts for morale.
The artifact can be given at the start (only treasure artifacts are distributed).
The prices of the artifact on the markets correspond to the treasure price. Therefore, there is evidence that this is a treasure artifact.
But the image of the spell itself in battle particularly points to bugginess. If the berserker's amulet simply prevents him from casting with a corresponding message in battle, then when the berserker is cast on a hero with the courage icon, there is no prohibition, it can be cast, mana is spent, but there is no effect. At the same time, when you target a potential unit, the blue outline around it is not displayed as it should be after other spells. That is, there are a lot of buggy manifestations. In my opinion, they simply mistakenly copied the entire code for the protection, which was somewhere nearby.