Lord Zir is a Lair Boss with his own unique loot pool. To earn rewards, you will need to defeat him while managing several mechanics. You can adjust the world tier in town to make the fight easier or more challenging. Higher Torment difficulty will reward you with better drops.
How to Summon Lord Zir
To open Lord Zir’s treasure after his defeat, you will need 12 
Exquisite Blood, which drops from Legion Events, World Bosses, and random drops from elites and treasure goblins during Helltides. These can be farmed by cycling through active world events and hunting elite packs in Helltide zones.
Once you have enough, head to The Darkened Way east of Kyovashad. You can travel directly to the dungeon by right-clicking. Make your way through the short dungeon, and at the end, you will find an altar where you can summon Lord Zir. You will need the Exquisite Blood to loot the reward chest after the fight.
Preparations
- Stack Shadow Resistance: Make sure your Shadow Resistance is as high as possible. You can also boost your Max Shadow Resistance with the
Elixir of Shadow Resistance II. - Play a Build You Trust: Bring a build with strong single-target damage and survivability. If unsure, check out our Boss Tier list for suggestions.
Boss Mechanics
Lord Zir deals mostly Shadow and Physical damage. Like most Lair bosses, he has a Stagger Bar; once it’s filled, it turns blue and will stun the boss temporarily, giving you a free damage window.
During the fight, in addition to his default attacks, Lord Zir has a few mechanics to watch for:
- Blood Puddles: Pools of blood spawn under and around you. Move out quickly to avoid standing in them, as they deal heavy damage over time.
- Frontal Cleave: When Lord Zir raises both arms, he prepares a large frontal cleave shown on the ground. Evade to his side or behind him to avoid the hit.
- Blood Globes: Around 50% HP, Lord Zir summons floating Blood Globes across the arena. Touching them causes damage. stay mobile and avoid contact.
- Add Spawn: Throughout the fight, Lord Zir summons waves of adds. Clear them quickly to maintain space and visibility. Starting at around 75% HP, he will begin summoning Elite Bloodseekers at random intervals. Focus them down before they start overwhelming you.
Loot Table
To get your loot, you will need to use the required materials to open the reward chest or hoard after the fight. The first Unique dropped is guaranteed to come from the boss-specific loot table below. Any additional Uniques have a 50% chance to come from the general Unique pool instead.
If you are playing in a group, each additional party member increases the chance of an extra Unique dropping by 33%.
In addition, Lord Zir also drops 
Pincushioned Doll required to summon Andariel or 
Stygian Stone required to craft any Lair Keys.
You can also earn The Diadem of the Ancient Helm.
Belial Ambush Encounter
After defeating a Lair Boss, there is a small chance that Belial will ambush you. This unexpected encounter brings its own set of challenges, as Belial uses a mix of Blood and Poison magic that you will need to avoid.
Defeating this smaller form of Belial will grant you a second round of loot from the Lair Boss you just killed, without requiring any additional materials. He will also drop the Betrayer’s Husk, the item needed to challenge Belial’s Exalted Lair Boss form.
To learn more about the ambush mechanics and how to deal with them, check out our Belial guide.
Belial Ambush Guide
