Immortals

"The Immortals. Bestowed with righteous power by Daedessa the Builder. Their charge? To defend Sanctuary against the Burning Hells. To use their strength to keep the relentless demons at bay. To be a beacon of hope and light. But victories are temporary, and the Immortals can never relent or yield. Even if all hope seems lost, they must find the courage to stand defiant for all time."

- Faction description

The Immortals are a knightly order of Sanctuary.

Lore
An order of sacred knights, the Immortals are "the most elite heroes" of the mortal realm, charged with protecting Sanctuary from demonkind. However, their tremendous strength leaves them at risk of corruption or burning out spectacularly. Most Immortals serve as elite Knights of Westmarch, but they owe a deeper allegiance to Daedessa; the nephalem who founded the order. The Immortals believe that Sanctuary's future—not just one kingdom or one age—rests on their armored shoulders.

The Immortals keep their spoils inside a vault, which includes a plethora of tools that aid them in their eternal watch over Sanctuary.

A single Immortal who bears the Eternal Crown leads the Immortals. The leader is accompanied by four lieutenants with crowns of their own. If an Immortal falls, their name and those of their four lieutenants are engraved on the Wall of Honor.

The uniforms of the Immortals are designed for both battle and rest, though it is rare for Immortals to ever find the latter.

History
Long ago, the nephalem Daedessa bid her son, Kion, form a group whose sole purpose would be the protection of Sanctuary from the Burning Hells. Kion obliged, and created the Immortals. In secret however, she bid her daughter, Akeba, to form a group that would constantly test the Immortals. Akeba called this group the Shadows, and they constantly tested the Immortals. It was agreed that should the Shadows ever overthrow the current reign, they would take possession of the Eternal Crown and become the new Immortals.

For a time, the Immortals successfully kept the demons of Hell at bay. However, events went awry for the Immortals when they battled against a force of demons in a forest, led by Rakanoth. The outcome of this battle is unclear, but it appears that it did not go in the Immortals' favor. Whatever the case, it was after this that the Shadows moved against the Immortals. The Shadows emerged triumphant, with Akeba becoming the next Immortal. She began the Cycle of Strife, which ensured that the Shadows would always test the Immortals, beginning a state of affairs that lasted well into 1270, by which point the strife between the factions was escalating.

Gameplay
Players can function as Immortals in Diablo Immortal; this is an entirely opt-in feature.

To join the Immortals, a player must be at level 43, have finished the Bilefen questline, and found the Timeworn Scroll in the Ancient Arena. Beyond this, however, the player must progress through the Shadows.

There can only be up to 300 Immortals on a server. Shadows, of which there are an unlimited number, are constantly trying to displace the current group of Immortals. Once the Shadows reach a certain point in their progression, the Rite of Exile event is triggered. Beyond this, a player will be transformed into an Immortal boss in the Challenge of the Immortal event, where they will gain a massive power buff and unique abilities.

If a Shadows Dark Clan beats the other Dark Clans and overthrows the Immortals, then that winning Dark Clan will become the Immortal Clan. Players in an Immortal Clan will stay together as a unit and can invite up to two other Dark Clans to become Immortal Allied Clans. When the Immortals’ reign ends, as all reigns must, the Immortal Clan will return to being a normal Clan as the Cycle begins anew.

A single Immortal leader bears the Eternal Crown, and four lieutenants have crowns of their own. Each crown grants an extraordinary power once it has reached a certain level of progression thanks to the reign's Dominance. A mixture of offensive and defensive buffs will emanate from these Legendary items, amplifying the wearer’s might as well as that of other Immortals in close proximity.

Immortals have exclusive access to the Kion's Ordeal event, and can take part in the Raid the Vault event. As Immortals complete tasks (I.e., Daily Goals) the Immortals will accumulate Essentia, a resource to spend which enables attempts on raids like Kion’s Ordeal. The Immortals also have access to the Corvus Expedition.

Trivia

 * Khazra appear in the Cycle of Strife trailer for Diablo Immortal, showing ancient nephalem Immortals battling khazra and other demons. This is either an error (as the khazra were formed after the Mage Clan Wars), or indicative that the original group of Immortals were formed and/or were active well after the Sin War.