New Mounts in 8.3

Many new mounts are added in Patch 8.3, and if you are a mount collector you might want to work on earning them.

Allied Races

with the addition of Vulperas and Mechagnomes, two new mounts are coming in 8.3, one for the Horde and one for the Alliance.

Mechagon Mechanostrider is Mechagnomes racial mount that will be accessible to Alliance Players, once they unlocked Mechagnomes.
Caravan Hyena is Vulperas Racial mount that will be accessible to Horde Players, once they unlocked Vulperas.

Drops

Three new Alpaca mounts were also datamined, Slightly Damp Pile of Fur drops from one the World Bosses Dunegorger Kraulok. the other two exact locations of drops, Reins of the Springfur Alpaca and Reins of the Elusive Quickhoof, are unknown.

Mail Muncher is a rare drop in Horrific Visions, a new feature of Patch 8.3, and many new mounts added that are added for Titan Assaults are

Clutch of Ha-Li
Ivory Cloud Serpent
Malevolent Drone
Reins of the Drake of the Four Winds
Ren’s Stalwart Hound
Waste Marauder
Xinlao

Rajani Warserpent can also be obtained from Rajani by dropping Pristine Cloud Serpent Scale.
Ny’alotha Allseer is N’zoth’ Mythic drop in Ny’alotha the Waking City.

Vendor & Achievements

Wriggling Parasite is the Reward of Glory of the Ny’alotha Raider and for Mythic+ Awakened Mindborer is the reward for Battle for Azeroth Keystone Master: Season Four.

Wicked Swarmer is sold for 100,000 Corrupted Mementos by Wrathion, The Horrific Visions vendor.
Wastewander Skyterror is sold by The Uldum Accord, one of the two Factions added in Patch 8.3, the other one being Rajani.
Shadowbarb Drone is a grind mount coming in Patch 8.3 which according to tests, takes 30 days to obtain it.

Battle Pets and Interesting Items

Battle Pets

There are also a lot of new Battle Pets, and Battle pets changes are coming in Patch 8.3, WoWhead has a great collection of datamined Battle Pets in 8.3 and it seems to be a lot of them, but only some are obtainable by Players. A lot of Battle Pet changes are also announced by Blizzard, including some Buffs to Blizzard and Mudslide and the Addition of Toxic Fumes weather effect.

Blizzard: Now also increases all elemental ability damage by 25%.
Mudslide: Now also increases all critical damage dealt by 25%.
To be really clear about the Mudslide change: Critical strikes usually hit for 150% of normal damage. Mudslide will now increase that to 175% of normal damage.

The adorable Dottie can also be bought from the In-game shop as the Blizzard Charity Pet for 2019.

Interesting Items

N’lyeth, Sliver of N’Zoth:
Use: Sacrifice part of your mortal essence, dealing 60% of your maximum health in Shadow damage to yourself.
In exchange you become Shath’Yar, breaking your normal faction allegiance, serving only N’Zoth.

This item will allow you to attack all Players from any Faction, similar to the Mists of Pandaria Censer of Eternal Agony. The rewards are unknown as of now.

Lightning-Forged Augment Rune:
Use: Increases Agility, Intellect and Strength by 60 for 1 hour. Augment Rune.

This item is like Legion reusable Augment Rune added in 7.3. It requires exalted standing with Rajani, one of the two factions added in Patch 8.3.

Nomi’s Vintage:
Use: Consumes a sip of Nomi’s Vintage, delivering a fiery burst to the senses! Only useable within Zandalar, Kul Tiras, and Nazjatar.

Horde players can Obtain this item when Completing Vulpera Allied Race recruitment questline.

New toys and Cosmetics found in Patch 8.3 from several Sources: Void Tendril Pet Leash, Hell-Bent Bracers, and Fierce Gladiator’s Totemic Cloak.

Goblin and Worgen Heritage Armor

Goblins and Worgens are getting Heritage Armors, after getting a model revamp in Patch 8.2.5. You can earn these Heritage Armors just by having a 120 Goblin or Worgen Character and being exalted your City.