What is exactly the point of this upgrade?
With 72 starting Leadership they don't have too bad morale; the +10 Leadership isn't all that much, and the Fear isn't all that awesome either.
The upgrade isn't even at least cheap, like is the case for all of Wurrzag's unique ones. It's whopping 80 Scrap. In what scenario would we really take the immortulz Armour over e.g. Jagged Weapons (+10 Bonus vs Infantry) or even the Longer Weapons scrap upgrades?
And unlike the other faction-specific upgrades, it s exclusively limited to just one unit (Black Orcs).