I’ve sometimes mused on that question when I look at my Priest’s abilities when she is “Shadow”. Some of her abilities are called Void, such as Void Eruption and Void Torrent and others are called “shadow” abilities, such as Mind Flay and Shadow Crash.
Void I get, we have that on the whole Cosmic chart with Void Gods and being opposite of Light and so on. But how does Shadow powers equate with that, and what’s the difference?
50 shades of shadow, with void at 0.
Great lot of help you are 
It’s all such a mess now. I recently read my Paladin alts ability tooltips.
Some of my abilities do “radiant damage” others do “holystrike damage” … what the …
As far as I could understand, the Void is a type of Shadow manifestation, like Holy is a Light manifestation, at least that’s what I can understand from the charts
Nowadays? How they’re spelt, Shadow is otherwise just a synonym for Void in the case of lore. The actual in-game damage school is either void magic or death magic being represented mechanically, hence DKs using it.
Pre-Chronicle it was vaguer and Shadow/Void/Death were all nebulously related, similar to how Arcane was diluted Fel magic rather than its polar opposite.
Shadow comes from spooky powers.
Void comes from space powers.
Shadowflame comes from demon powers.
It’s all dumb bring back good vs evil
It’s the same stuff.
Void is the domain, shadow the magic type.
Like light is the domain and holy the magic type.
In TBC, one might have assumed that Shadow was something between Void and Light. The three Naaru cycles and the shadoweave tailor trainer (Josephine Lister) were the indicators of this. Back in the day, light and shadow didn’t have their own planes either.
So a lot has changed or wasn’t fully fleshed out. That’s why some stuff that have been around since Classic no longer fit perfectly.
Isn’t the other way? Shadow being the domain and Void the magic type? At least looking at the chart.
Shadow is dark type, void is ghost type, arcane is psychic type and holy is fairy type.
shadow as far as i can tell is a bit of a inbetween of void and death, they are right next to each other on the cosmology chart too
At this point, they’re pretty interchangeable.
I encourage everyone here to read Warcraft Wiki.
Thanks for the link. Reading it is interesting. It says at one point the Void can’t exist on the physical plane but on the other hand, the Old Gods are called “physical manifestations of the Void”. Which would seem to mean they are at least in some part actual Void.
I know this is all really more suited to the Lore forums, I guess I should transfer it there? Dunno how that works.
Shadow and Void magic seem somewhat interchangeable as to nomenclature so I guess one could say a Priest might be said to ‘serve’ both the Light and the Void.
In case you were actually wondering, radiant damage is fire & holy together. holystrike is holy and physical damage together. Initially it was stated that multiple damage type attacks would respect the path of least resistance, so if you attack something resistant to fire, the holy part of radiant would override and it would do damage. Sometimes, though, it feels like it is the opposite. Like if you use a holystrike ability against something immune to physical damage, the holy part doesn’t do anything, it just comes across as immune. It’s like “The worst of both worlds” lol.
Chronicle says that pure Light and Shadow only exists outside the borders of Reality(just as the Shadowlands, Emerald Dream, Elemental Planes and Twisting Nether exist outside the borders of Reality).
Shadow also known as the Void appears as Shadow Magic while the Light appears as Holy Magic(although as Dragonflight shows Light is not the only Holy Magic as Order manifests as Holy Magic too).
The Naaru are closest to Pure Light without being outright Pure.
Personally I suspect the Light’s Realm to have Crystals like Beledar as it’s borders so that while part of the Physical Realm it’s not part of the Domain of Reality being set apart from Reality by an Impure Crystalline Border.
There is no good or evil.
There is only POWA!