What kind of magic do you like?

But it's a pity that nature doesn't have a "remove curse" spell or something like that... And anti-magic affects both allies and enemies.

Heh... after you max out all the nature magic skills, you can also level up Life or Order... just imagine what Nature is like... It's simply amazing, even if you only consider the spells: "Dragon Strength," "Giant Strength"... and your character becomes not only durable but also formidable in battle. In my opinion, this is one of the strongest buffs in Heroes 4.