List of flavour and hidden artifact abilities.

[willtron]

Trying to compile something, this is what I have so far with help from various people on the WoW Subreddit:

(Italics denotes unconfirmed or speculated)

Druid
Feral - Increase 3% movement speed out of combat.
Balance - Ancient and powerful magic has affected this creature. Only a powerful Druid wielding the Scythe of Elune can dispel the effect. & "Feral Worgen" out in the Broken Isles (neutral) that you can de-curse with the Balance Artifact.
Restoration - Treant in Dalaran tosses an apple when he recognises G'Hanir. Flowers growing at feet when still.
Guardian -

_______________________________________________

Paladin
Protection - Allows you to see hidden demons.
Retribution - When you kill a demon or undead, they turn into ash. Chance to instantly kill on an auto attack (white[sic]) swing.
Holy - Increased damage by 100% against Undead.

_______________________________________________

Hunter
Marksmanship - (Stacking) Speed buff.
Survival - Eagle called to aid under 40% health. Turn into eagle when dead/ghost.
Beast Master -

_______________________________________________

Warrior
Fury - Ressurected by Odyn, must kill within 8 seconds to stay alive.
Arms - Fear trolls.
Protection -

_______________________________________________

Death Knight
Frost - Growing frost patch on the ground while standing still.
Unholy - Chance on kill to leave the enemies rotten corpse discolored and swarming with flies. Chance on hit to finish off enemies below 20%.
Blood - Stacking 30 second buff every time they kill something. Each stack gives a 1% damage increase and I assume it stacks infinitly long as you kill something else before the 30 seconds is up, max 10%.
_______________________________________________

Mage
Fire - Corpses burn.
Arcane - Flat 2% damage increase in Broken Isles. whispers to you every now and then, when you use certain abilities
Frost - able to speak to an NPC in Dalaran (pretty certain it's only Frost Mages since the NPC remarks you have Alodi's staff) which gives you a 2hr buff that increases XP and Rep gains by 5% in the Broken Isles.

_______________________________________________

Monk
Windwalker - Knock back effect on some attacks, when jumping from a certain height. approx 1.5x jump height
Brewmaster -
Mistweaver -

_______________________________________________

Priest
Discipline - Chance to do "massive" damage. Smite builds up over time and then unleashes on a random cast. Approx 20 minutes.
Shadow - Blade whispers to you.
Holy -

_______________________________________________

Rogue
Outlaw - 2% Movement speed increase upon killing lasts 30/60 seconds.
Subtlety -
Assassination -

_______________________________________________

Shaman
Elemental - Certain air elementals in Stormheim become friendly.
Restoration - Watery ground effect, and start kneeling when AFK
Enhancement -

_______________________________________________

Demon Hunter
Havoc -
Vengeance -

_______________________________________________

Warlock
Affliction - Killed enemies can leave behind a purplish soul.
Destruction -
Demonology -

_______________________________________________

If anyone has anything extra or any corrections, please let me know.

[Kyrenna]

About retribution paladin, all demons and undead do not turn into ashes. In fact, only those you instakill do. That proc is so satisfying btw ^^

[Smank]

Thanks for putting this together man

[Al Gorefiend]

Noticed you italicized the shadow priest dagger, meaning it's unconfirmed?

It's definitely confirmed. It was the first hidden artifact flavor discovered.

[Maudib]

I was doing WQs last night and noticed a couple ghost copies of my Felo'Melorn floating and attacking nearby mobs. I wasn't fast enough to figure out if there was a buff, I didn't see any damage numbers coming from them... but it was neat as hell.

[schwarzkopf]

I know the Arcane mage artefact has an ability where it sucks a buff out of pools around the place giving you a bonus to INT or damage or something.

Basically - you are walking around and suddenly it starts channelling from a pool, and adds a few minutes for every tick of the channel to the buff.

[Irian]

The demonology Artifact will actually comment on dungeons you enter and locations you visit, and will also occasionally yell when you use Call Dreadstalkers.

[Gemini Soul]

Nice list, wonder what the Guardian one is.

[Alvito]

Interesting hook to get you to grind rep as a frost mage.

[Fearsom1992]

Hidden artifact skin for affliction is called Executioner and dropped while leveling the item is called Tome of the First Necrolyte

[Kazlofski]

I like those small things they are adding, finally game seems like it's going back to it's roots when classes felt different and the world was full of different cool things even if minuscule sometimes.

[TiaMaster]

I have yet to see the "frosty ground" effect of the DK Frost art.

[Deleted]

I have yet to see the "frosty ground" effect of the DK Frost art.

Just stand idle for a few minutes

[Alvito]

I have yet to see the "frosty ground" effect of the DK Frost art.

For me it has happened just before my character sits from the afk timer.

[SirCowdog]

Human frost mages gotta love that accelerated rep gain.

[Deleted]

Stil wonder what the prot warrior one is, perhaps an interaction with black dragons or maybe even wrathion?

[Delaios]

Frost - able to speak to an NPC in Dalaran (pretty certain it's only Frost Mages since the NPC remarks you have Alodi's staff) which gives you a 2hr buff that increases XP and Rep gains by 5% in the Broken Isles.

Oh my god. So leveling as Frost is now mandatory? 5% extra XP means you level 5% faster and can get to max level content faster. And you're forced into Frost if you are after reputations.

[b0928]

Minor correction: the blood buff doesn't come from killing ANY enemy, it comes from killing demons and humanoids

[Galbrei]

Oh my god. So leveling as Frost is now mandatory? 5% extra XP means you level 5% faster and can get to max level content faster. And you're forced into Frost if you are after reputations.

"Forced" because of 5%? Wow...

[Sluvs]

There are no Demon hunter hidden abilities discovered so far?