YES ! Yes ! yes !
Finally got my barbarian 10 stars in hard mode unlock by beating the necromancer tower scenario.
Surprised me on this victory that it gave me 3 stars while i needed only 1
Got it with the suggested the onk's lockpicks + chest plate item combo, and the witch knife as the 3rd (for the ability of getting enemy dying from curse to give me money and so precious to the barbarian red gems). Wasn't easy at all as it took me half a billions of attempts with those items to finally win this one
Those curses that high life enemies were putting on your dices were really a pain to deal with as if unlucky you could roll several cursed die (and lose 1 more health for each of them).
Additionally you also needed all the luck you could to benefit from your best attack dice (how much time i got the weakest attacks on 3 re-rolls even when i had several hard hitting ones, thanks to the chests+items)
It's not a bad hard mode item though considering how many times i went to low health in those hard mode scenarios :
edit :
i just got my best run in campaign mode with the barbarian.
Sady it ended at the Frozen Horror scenario, at a turn from the victory with the 3 bosses, the frozen big boss just went ... unfrozen.
It killed then me right after i killed the 3rd boss.
At 1 turn of winning that one, damn bad luck as if i had 1 more attack on the previous turn i would have finished the scenario ...
I find campaign mode interesting because out of the 3 starting items, each scenario won unlock a random item, so you will end with item or combinaison of them you usually never use anywhere else.
I wonder if it can unlock hard mode items, would be a nice workaround to trying to get 10 stars in insanely crazy hard scenarios