Posts from “Heroes of Might and Magic V: Tribes of the East” Auto-translated

That's exactly why we're panicking, worried that we haven't forgotten about Light, Summoning, and the like! Races that wield these types of magic gain an obvious and unfair (and therefore very frustrating for Warlocks of Darkness and Chaos) advantage...

most likely, they will give Orcs a small chance of getting magic immunity, perhaps 5% or 2%, or maybe 10% or 8%

rather, the opposite: immunity will appear with the same probability as different schools of magic in other factions - i.e., often. Otherwise - how will the remaining slots be filled?

well, let's take a look at the magic drop rates for different factions:
class light dark chaos summon
knight 8% 8% 2% 2%
demon 2% 8% 10% 2%
ranger 8% 2% 8% 2%
warlock 2% 2% 15% 10%
wizard 10% 8% 10% 15%
necromancer 2% 15% 8% 10%
rune mage 8% 2% 10% 4%
from this, it follows that the chance of a Barbarian getting a skill will be around 5%

These are percentages on paper, but in practice, at least one magic spell drops for everyone on the early levels... and often, the random generator persistently offers more...

and besides, has it ever happened that a demon was offered light magic?