In principle, it's a decent staff, especially if you fully upgrade it. It enhances certain hero characteristics (like all weapons), and it takes away the special abilities of the selected monster for a few turns. And as far as I understand, it affects any ability – both cast spells and various bonuses like cavalry bonuses, jumping across the entire field, setting traps, etc. It also seems to add a stun effect (-10 initiative) to the hero's attack spells at level 5. You won't find this staff anywhere else in the game. I bought it without hesitation. As for the hero, I'm not sure yet. I'm not in a hurry to spend points on him.
Цикл "Закадычные враги": "Особенное гостеприимство, "Супероружие", "Меж молотом и наковальней"
"Падение Шантири"
Кампания для "Кодекса Войны"
"Выбор Сагиттеля"