World of Warcraft: Legion is the sixth expansion set in the massively multiplayer online role-playing game (MMORPG) World of Warcraft, following Warlords of Draenor. It was announced on August 6, 2015 at Gamescom 2015. The expansion was released on August 30, 2016.

The expansion raised the existing level cap from 100 to 110, features artifact weapons for each class's specializations, includes a new area on Azeroth called the Broken Isles and introduces the demon hunter hero class that started at level 98. It initially included ten 5-man dungeons and two raids.

Gameplay

At release, the expansion allowed players to level up to 110 in the Broken Isles, an increase from the cap of 100 in the previous expansion Warlords of Draenor. Initially, there were ten dungeons in 7.0 with patch 7.1 adding the revamped Karazhan dungeon, patch 7.2 adding Cathedral of the Eternal Night and patch 7.3 adding the Seat of the Triumvirate on the planet Argus - the headquarters of the Burning Legion and the former home of the Draenei.World of Warcraft patch 7.3 will take players to Argus Blizzard Watch, November 4, 2017. There are four raid tiers in Legion, with the first tier being The Emerald Nightmare that opened three weeks after Legion's release along with the small raid Trial of Valor that opened in patch 7.1, the second raid tier The Nighthold in patch 7.1.5, the third raid tier Tomb of Sargeras in patch 7.2.5 and the final raid tier is Antorus, the Burning Throne on Argus in patch 7.3.2. After Emerald Nightmare was opened, Mythic Plus dungeons and Legion'''s first player versus player (PvP) season began. PvP seasons usually follow raid tiers or major patches, with Season 6 beginning after Antorus opened.

The development team made a number of changes to the PvP aspects of the game. There is a PvP honor system that unlocks PvP honor talents, and separate abilities for use only in PvP. Honor talents are abilities earned through increased PvP levels and activated during PvP. Once players hit maximum honor level, they can choose to earn a prestige level that resets the honor talents earned and gives cosmetic bonuses. In PvP combat, gear will be nullified and all bonuses related to gear will be deactivated, with the exception of artifact weapons and their related powers. Instead, the game will predetermine a set of stats configured to a player's specialization that can be modified for class balance purposes. However, a player's average item level will still factor in PvP; every point above item level 800 results in a 0.1% increase to a player's PvP stats.

Artifact Weapons Artifact weapons are powerful items that were wielded by legends of the Warcraft universe, and only available to player characters in Legion. There are 36 unique weapons specific for every class and specialization combination, which include the Ashbringer (the sword wielded by the Mograine family, and later Tirion Fordring) for retribution paladins, the Doomhammer (the warhammer wielded by Thrall) for enhancement shamans, the Icebringer and Frostreaper (twin blades together known as the 'Blades of the Fallen Prince' that are forged from the Frostmourne wielded by the Lich King) for frost death knights, and other powerful weapons from the Warcraft lore. In addition, there is a fishing artifact called the Underlight Angler for those dedicated to fishing. Players complete quests to obtain these weapons, and the weapons will gain power alongside the player as they level in the Broken Isles, complete world quests, and defeat bosses. The appearance of each artifact can be customized and artifact-specific appearances are unlocked after completing certain tasks. At level 102, quests are available to acquire the other artifact weapons from a player's class that were not initially earned at level 100.

Demon Hunters Demon hunters are the second "hero class" in World of Warcraft, joining death knights that were introduced in Wrath of the Lich King. Demon hunters begin as members of the Illidari, the elite guard of Illidan Stormrage during his rule of Outland in The Burning Crusade. Demon hunters operate on the concept of "fighting fire with fire", wielding demonic fel magic to fuel their attacks and harnessing the powers of demons they kill to fight against the Burning Legion. To become demon hunters, an initiate must consume the heart of a demon that results in most initiates dying due to being overwhelmed by the demonic energy or going insane; the survivors become part demon, taking on demonic aspects including horns, wings, claws and hooves. Demon hunters ritually blind themselves to gain 'spectral sight', allowing them to detect demonic energy from demons and to see stealthed enemies, but losing their eyes in the process.

Similar to death knights, demon hunters are able to fill the tank or damage dealer (DPS) role, but only have two specializations: Vengeance for tanking and Havoc for DPS. They wear leather armor and wield a pair of warglaives: curved, two-bladed short sword similar to the Blades of Azzinoth wielded by Illidan. Unlike death knights, which are available to all races, demon hunters are only playable by the two elvish races: Night Elves and Blood Elves. While any race has the potential to become a demon hunter, Illidan only trained elves in the Black Temple.

As a hero class, a demon hunters started at level 98 rather than level 1. Demon hunters have a unique starting experience, similar to death knights; their story begins ten years before Legion (shortly before Illidan's death in the Black Temple raid, as depicted in The Burning Crusade) on the shattered Burning Legion world of Mardum, where they have been sent by Illidan to obtain a demonic artifact, the Sargerite Keystone, used to gain access to the Legion-controlled planets. Upon returning to Outland, the demon hunters find Illidan slain by the Wardens, and are captured and imprisoned in the Vault of the Wardens on Azeroth. Ten years later, demon hunters are freed in order to fight against the Burning Legion after the Horde and Alliance losses at the Broken Shore. As a base of operations, the class's order hall is the captured Legion ship Fel Hammer located on Mardum.

Mythic Plus The expansion added a new dungeon difficult: Mythic Plus (stylized as Mythic+ or M+), activated by a keystone. Completing a dungeon that has been activated with a keystone within the time limit awards a higher level keystone, and a chance to receive character items proportionate to the difficulty.

Order Halls Each class has an "order hall" - a place of great power linked closely to a character's class, such as Acherus (the hub for death knights introduced in Wrath of the Lich King) or the Temple of Five Dawns (the hub for monks introduced in Mists of Pandaria), where only members of that class can congregate. Player characters can upgrade the look and abilities of their artifact weapons in their class's order hall and engage in missions in the Broken Isles. The player character, for lore purposes, is the leader of the class's organization in question (e.g. a paladin character is the Highlord of the Order of the Silver Hand), similar to being the commander of Alliance or Horde forces in Warlords of Draenor. The order hall locations include the sanctuary beneath Light's Hope Chapel for paladins, a cave overlooking the Maelstrom for shamans, and an enclave on the Burning Legion portal world of Dreadscar Rift for warlocks. The order halls do not include access to the auction house or banks and only the druid and mage order halls include a mailbox. Notably, members of both the Horde and Alliance are seen in the membership of these Order Halls, showcasing the unity of the rival factions in the wake of the Legion's invasion.

Changes to existing classes Some existing classes experienced major changes. For example, hunters, who are predominantly ranged and rely on pet damage, had their three specializations changed: Survival allows them to wield melee weapons while fighting alongside their pet, Beastmaster can use multiple pets at once and Marksmanship has the option to forgo their pet in exchange for stronger ranged abilities. Warlocks' demonology specialization no longer has the metamorphosis ability because the ability was given to demon hunters; this warlock specialization is refocused around using multiple summoned demon minions at once, fundamentally changing the specialization. Other removals from the game included the Gladiator Stance talent for Protection Warriors, which helped that specialization do more damage at the expense of tanking ability, and the Fistweaving talent that allowed Mistweaver Monks to heal allies by dealing melee damage. All of the class changes are explained in each of Blizzard's "Legion Class Preview Series".

Transmogrify 2.0 The transmogrification system, which allows players to remodel their items' appearances, was expanded with Transmogrify 2.0. All soulbound item appearances players have in their inventory and bank were added to the wardrobe's user interface, similar to the transmogrification system used in Diablo III: Reaper of Souls. Additionally, all applicable gear rewards from every quest completed and treasure found were also added to the player's wardrobe. The wardrobe can be used to create outfits that can be saved to a list and set to change automatically with specialization changes. After items have been added to the wardrobe, the player does not need to keep them in their bank or inventory in order to retain the appearances in the wardrobe.

In addition to the existing options to hide helms and cloaks from appearing on a player character, an option to hide shoulder armor was added to the transmogrify system in patch 7.0. In patch 7.1, options to hide belts, tabards and shirts were added.

Plot

Following the defeat of Archimonde at Hellfire Citadel in an alternate timeline Draenor, the orc warlock Gul'dan was transported to the main timeline Azeroth. Gul'dan invaded the Vault of the Wardens, a prison used to contain dangerous beings from across Azeroth, with the help of the traitorous former Watcher Cordana Felsong, whom he had successfully corrupted to his side back on Draenor. In desperation, the wardens released the "Illidari," demon hunters that use fel power, to help fight against the Burning Legion. Despite this, Gul'dan was successfully able to steal the body of Illidan Stormrage and traveled to the nearby Tomb of Sargeras and opened a massive portal, thereby allowing the Burning Legion to invade Azeroth.

In a pre-expansion event, demonic invasions spawned throughout Azeroth, with both the Alliance and Horde fighting to defend their lands. Khadgar begins researching ways to sever the Legion from their source of power at the Tomb of Sargeras, consulting with the newly awoken Magni Bronzebeard. Magni declares that his innate connection with the land during his slumber has allowed him to communicate with the nascent Titan slumbering within Azeroth. Only by using the five Pillars of Creation, incredibly powerful Titan artifacts, can the forces of Azeroth drive back the Legion. Khadgar teleports the Kirin Tor capital city of Dalaran to the tower of Karazhan to further his research.