Magic in Heroes of Might and Magic V.

actually, morealyz is right. essentially, it's magic. yes, if you reason and look at the root of things, and also analyze the somatic and verbal elements of spells, etc., etc..., then you can come up with a lot of things. for example, that even a swarm of wasps isn't magic, because a hero can throw a candy at a unit, and wasps will fly to it from everywhere... and no mana would be required.
but, whatever you call the Orcish classes, it's magic.
it's interesting, why then do "simple shouts" and "appeals to mother earth" cost mana? hehe.