Reflections:
Given that the second special ability for Dwarves is linked to the "Wrath" spell, there's a conflict with the "Holy Hammer" specialization – the "Wrath" effect from "Holy Hammer" will be applied on top of the "Wrath" effect from the special ability, leading to the following:
Firstly, why have two ways of applying mass "Wrath" simultaneously?
Secondly, when "Wrath" is applied from the special ability, the spell is applied permanently. However, when "Wrath" from the specialization is applied on top of it, the spell is refreshed (replaced), resulting in the removal of the permanent "Wrath" and the application of a temporary "Wrath" from the hero.
Due to the reasons mentioned above, I decided to remove this specialization from the Dwarves. One option is to give it to the Elves and replace the "Wrath" application with the "Dispel" spell – I've tested it (it works). However, now I'm thinking that, on the one hand, it becomes very situational, as the specialization will only be truly effective when playing against a hero using mass Darkness spells. On the other hand, it's overpowered – it will almost completely counter the opponent on Darkness (Berserk will still be impossible to dispel). In other cases, it will allow for mass dispel on all your units.
What do you think about this – should I change the specialization? What other spell could be used instead? I tried regeneration – it's not bad, but it's probably also overpowered (mass regeneration is too strong), plus I'm afraid they'll start prolonging battles to break even