Diablo 4 changed the entire Lair Boss reward system in Season 13, especially after the Lord of Hatred expansion introduced the newer hoard-opening mechanics.
Players no longer need to collect separate boss materials just to claim rewards after defeating Lair Bosses across the endgame.
Instead, regular Lair Keys are now one of the main resources used to open Initiate Boss hoards, making them an important part of progression and Unique farming.
How To Farm Lair Keys?
1) Key Spoils in War Plans
War Plans are one of the more reliable ways to obtain Lair Keys since Key Spoils can regularly reward them during seasonal progression activities.
Players pushing seasonal objectives and higher-end War Plan content will usually build up a steady amount of Lair Keys over time through repeated completions.
2) Tortured Gifts in Helltide
Tortured Gifts found during Helltide events have a chance to reward Lair Keys alongside other crafting materials and endgame loot.
Farming Helltides consistently is a solid option if you want to collect Lair Keys while also gathering materials, gear, and Forgotten Souls at the same time.
3) World Bosses and Legion Events
World Bosses and Legion Events can both reward Lair Keys after completion, especially when played on higher Torment difficulties.
These activities are useful because they are relatively easy to join while still giving valuable endgame rewards outside of just Lair Keys alone.
4) Cache Rewards from The Tree of Whispers
Tree of Whispers caches can occasionally contain Lair Keys, depending on the type of cache and the rewards rolled after turning in Grim Favors.
This makes Whispers a decent passive farming method for players already completing bounties and other endgame objectives around Sanctuary.
5) Undercity of Kurast
The Undercity of Kurast can also reward Lair Keys through its endgame activity completions and related reward systems.
Players farming the Undercity regularly will often collect extra Lair Keys naturally while progressing through the activity for other rewards and drops.
Lair Key Uses
Lair Keys are mainly used to open Initiate Lair Boss hoards after defeating the related boss encounter, allowing players to claim the rewards stored inside afterward.
These hoards are one of the main ways to farm class-specific Uniques, Mythic Uniques, crafting materials, and other valuable endgame rewards throughout Season 13.
It is used to open the following Initiate Boss hoards:
- Varshan
- Grigoire
- Beast in the Ice
- Lord Zir
- Urivar
Initiate Boss hoards can also reward Greater Lair Keys, making them an important part of progressing toward higher-tier boss farming later in the endgame.
Best Ways To Farm Lair Keys
War Plans are generally one of the best consistent sources of Lair Keys because they can reward Key Spoils regularly through seasonal progression.
Helltides are also very efficient since Tortured Gifts provide a chance for Lair Keys while also rewarding useful crafting materials and gear.
Players looking for more passive farming methods can combine Tree of Whispers, Legion Events, and World Bosses while progressing through other endgame activities.
Verdict
Lair Keys are now one of the most important resources tied to the Season 13 boss farming system and overall endgame progression.
Since Initiate Boss hoards require them to unlock rewards, players will naturally want a steady farming route prepared before pushing deeper into Lair Boss content.
Between War Plans, Helltides, Whispers, and other activities, there are multiple reliable ways to keep building up Lair Keys throughout the season.
