Magic in Heroes of Might and Magic V.

Not at all. Warcries are much simpler than they seem. Increasing creatures' attack damage is, of course, great. It's an overpowered spell. But I don't remember any similar spells. Forcing creatures to attack directly is certainly magic. Orcish axe magic. Increasing rage doesn't even come close to being magic. Frightening Roar. If you call it magic, then nightmares should be considered casters. In any case, there are no such spells, and its effectiveness compared to spells of levels 3-5 is rather questionable. Horde Fury is the only warcry that resembles a spell. But no spell is so cruelly tied to the number of creatures. Does Battle Cry resemble magic? What exactly, a mass punishing strike? Well, yes, especially if the caster's spellpower is equal to one.

The point is that in Heroes, there are no races that don't have caster creatures. So the developers had to come up with a way to give shamans two simple (though quite effective) spells.