Magic in Heroes of Might and Magic V.

Orcish warcries aren't magic because in Heroes of Might and Magic 5, there are FOUR schools of magic: summoning, chaos, light, and darkness. Orcish warcries don't fit into any of these four schools. It's just something that replaces real magic for the orcs, but the fact that mana is spent – how do you imagine increasing the fury of a friendly unit by 300 units without spending mana?

Added 2 minutes later

for example, the Hive spell isn't magic either, because the hero can throw a candy at a unit, and wasps will fly in from everywhere... and no mana would be required.

The description of the spell says that the hero SUMMONS a swarm of wasps, not throws a candy at the enemy. If he were throwing it, there would be no questions; it wouldn't be magic.