Well in the end all the classic Hero will get costume and no more Slow Mana Hero when you put Mana troops on them. (My Vivica is smiling on Average Mana now)
But yeah it’s new Mechanic. But I don’t see that he is a big thread. Probably he will be useful in offense in arrow Wars.
Apart of that. I really don’t don’t think he is good with defense (we have tons of dispeller green already).
I just hope a better invention healer tho. Maybe another mechanic that prevent stealing / decreasing health generation.