Diablo 4 Season 8 Boss Powers guide – how to unlock all 24 powers and their effects explained

Another season, another mechanic, and Belial’s Return lets you wield the powers of bosses past who’ve given you a good trouncing.

Season 8 is shaking things up with its , a Berserk collab, and is scrapping Ladder Bosses for Lair Bosses, that sees bosses break out into three tiers: Initiate, Greater, and Exalted, which denotes how tough they are, and how good of a reward you get for beating them.

By defeating World, Event, and Lair bosses, you can claim their powers and wield them for yourself to give the monstrous denizens of Sanctuary a taste of their own medicine. This also includes the new Apparition Incursion event bosses.

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There are 24 Boss Powers to choose from in 4 Season 8, with each power having two effects – a Main and Modifier. These effects are activated depending on which Power Slot you pop them into, and you can have one Main and three Modifier Powers active at a time.

Here’s a full breakdown of Diablo 4 Season 8 Boss Powers, how to unlock them, and their effects.

Diablo 4 Season 8 Boss Powers guide Any difficulty level Wandering Death's Chest Beam

• Obtained after defeating the World Boss, Wandering Death
• Main: While Channeling a Skill, spawn a beam that deals 300% Frostbite damage per second. Enemies hit take 50%[x] increased damage from you for 1 second.
• Modifier: Your Main Boss Power instantly Executes Non-Boss enemies hit with less than 15.5% Life. When you Execute enemies you gain 25 Primary Resource.

Ashava's Poison Breath

• Obtained after defeating the World Boss, Ashava
• Main: Hitting an enemy affected by Damage over Time spawns a wave of acid that deals 1,200% Poisoning damage over 4 seconds. Applies 10% more Poisoning for each 1% of the target's current Life affected by Damage over Time.
• Modifier: Once per activation, damaging an enemy with your Main Boss Power also applies 45% Poisoning damage to it over 3 seconds.

Avarice's Explosive Ore

• Obtained after defeating the World Boss, Avarice the Gold Cursed
• Main: When you gain excess Primary Resource, spawn a Piece of Ore. After 2.5 seconds the Piece of Ore explodes dealing 700% Fire damage. You can spawn up to 3 Pieces of Ore at once.
• Modifier: Activating your Main Boss Power spends all your Primary Resource to increase its damage by 0.01%[x] per Resource point spent.

Allek's Talons

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Casting a Basic Skill applies 200% Sparking damage over 4 seconds to enemies it hit.
• Modifier: Gain 5% Movement Speed, increased by 0.5% for each 1% Cooldown Reduction you have, up to a maximum of 11%.

Beastmaster's Training

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Whenever you cast a Summon Skill or call a Mercenary for Reinforcement, one of your Summons or Mercenaries Stuns surrounding enemies for 2 seconds and gains 75% Damage Reduction.
• Modifier: Your Summons deal 5%[x] more damage, increased by 0.25%[x] for each 1% Bonus Critical Strike Damage you have from items and Paragon, up to a maximum of 17%[x].

Blackmailer's Sabotage

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Casting a Core Skill while you have a Barrier Knocks Down Close enemies for 1.1 seconds. This cannot occur on the same enemy more than once every 5 seconds.
• Modifier: Whenever you gain Fortify, additionally gain 11% of the amount as Barrier for 6 seconds.

Flesh Reaper's Disruption

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Damaging a Vulnerable enemy removes the Vulnerable and then Stuns them and surrounding enemies for 0.5 seconds. This Stun applies 100% more Stagger to Bosses.
• Modifier: Gain 5%[x] Vulnerable Damage, increased by 0.5%[x] for each 1% of Crowd Control Duration Bonus you have, up to a maximum of 10.5%[x].

Hatred's Embrace's Haste

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Casting a Shadow or Fire Skill grants 1.1% increased Movement Speed for 3 seconds, up to 11%.
• Modifier: Gain 5%[+] Critical Strike Chance, increased by 0.5%[+] for each 1% of Shadow Resistance you have, up to a maximum of 12%[+].

Kirma's Sparks

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: When you Evade, apply 200% Sparking damage over 4 seconds to Close enemies.
• Modifier: Your Evade Cooldown is reduced by 5%, increased by 0.2% for each 1% Lightning Resistance from bonuses you have, up to a maximum of 11%.

Outlaw Sharpshooter's Eye

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Dealing Direct Damage to a Distant enemy Slows them and surrounding enemies by 40% for 5 seconds.
• Modifier: You deal increased damage to Enemies the further they are from you, up to 10.5%[x].

Sinerat's Flames

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Using a Mobility Skill Burns Close enemies for 50% Burning damage over 4 Seconds.
• Modifier: Gain 5%[x] increased damage to all Elements. For each 1% of an Element's Resistance from bonuses, gain 0.2%[x] increased damage for that Element, up to a maximum of 15.5%[x].

Skerg's Toxins

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: When an enemy deals damage to you, apply 600% Poisoning damage to them over 4 seconds.
• Modifier: When you take damage from a Damage Over Time effect, you have a 5% chance to be Healed instead, increased by 50% of your Poison Resistance from bonuses, up to a maximum of 12%.

Torusk's Rage

• Obtained after defeating this Apparition in the Apparition Incursion event
• Main: Damaging a Crowd Controlled enemy makes them and surrounding enemies Unstoppable but you gain 10.5%[x] increased Damage, Attack Speed, and Movement Speed for 3 seconds.
• Modifier: Gain 5%[+] Attack Speed, increased by 0.25%[+] for each 1% Damage to Crowd Controlled Enemies you have, up to a maximum of 10.5%[+].

Torment I difficulty level or higher Belial's Crystal Decoy

• Obtained after defeating Belial in a Lair Boss ambush
• Main: When you Cast an Agility, Defensive, or Macabre skill, spawn a crystal that Taunts enemies and explodes after 3 seconds, dealing 600% Shadow damage.
• Modifier: Activating your Main Boss Power Fears Nearby enemies for 0.75 seconds and deals 50% Shadow damage to them.

Lilith's Wind of Hate

• Obtained after defeating Lilith
• Main: When you Cast a skill, attack enemies with a wave of spikes that lasts 2 seconds and deals 400% Physical damage. Enemies take 60%[x] increased damage from Wind of Hate each time it hits them, up to 300%[x].
• Modifier: Hitting an Elite enemy with a Main Boss Power creates an inert Blister Clone with 10% of their Maximum Life for 15 seconds. Killing the Blister removes 2.1% of the Elite's Life. An Elite can have up to 1 Blister active at once, and a Boss can have up to 2 Blisters. Enemies with Resilience cannot spawn Blisters.

Duriel's Burrow

• Obtained after defeating the Greater Lair Boss, Duriel
• Main: When you Evade, you now burrow underground, immobilizing surrounding enemies for 5 seconds and dealing 100% damage on your entry and exit. You deal 100% damage every 0.25 seconds while burrowed. Evade's Cooldown is increased by 4 seconds, and Cooldown Reduction on Evade is 50% as effective.
• Modifier: Activating your Main Boss Power grants you 21%[+] increased Dodge chance for 5 seconds. Whenever you Dodge an attack you Immobilize Nearby enemies for 3 seconds.

Belial's Eye Beams

• Obtained after defeating the Exalted Lair Boss Belial, Lord of Lies
• Main: After you drink a healing potion, gain 50% Damage Reduction for 2 seconds and summon eye beams that Corrupt enemies for 438% damage over 3.5 seconds. Then, your Healing Potion becomes disabled for 5 seconds. You may drink your Healing Potion at full Life.
• Modifier: Activating your Main Boss Power grants Stealth for 2 seconds. After entering Stealth, you deal 11%[x] increased Overpower Damage for 2 seconds.

Andariel's Flaming Skull

• Obtained after defeating the Greater Lair Boss, Andariel
• Main: After standing still for 1 second, summon a skull for 4 seconds that rotates around you and breathes fire that Burns enemies for 450% damage over 3 seconds.
• Modifier: Enemies take 10.5% more damage from your Damage over Time effects.

Beast in the Ice's Sleet

• Obtained after defeating the Initiate Lair Boss, Beast in the Ice
• Main: After casting 3 Skills which apply Crowd Control or Stagger effects, shoot out sleet spikes that deal 800% Cold damage and Freeze enemies for 2 seconds.
• Modifier: Your Main Boss Power now Chills enemies it damages for 2.5%[x].

Grigoire's Lightning Square

• Obtained after defeating the Initiate Lair Boss, Grigoire
• Main: After you cast a Core Skill, lightning tiles outward for 1.2 seconds dealing 250% Lightning damage per strike.
• Modifier: Once per activation, damaging an enemy with your Main Boss Power Stuns enemies it hits for 0.25 seconds.

Lord Zir's Blood Pool

• Obtained after defeating the Initiate Lair Boss, Lord Zir
• Main: After you damage an enemy, spawn a pool of blood that deals 400% Bleeding damage per second over 4 seconds. You can have up to 3 active pools.
• Modifier: Activating your Main Boss Power Heals you for 17% of your Maximum Life over 3 seconds.

Varshan's Life Steal

• Obtained after defeating the Initiate Lair Boss, Varshan
• Main: Every 1 second, attach a leeching beam to the closest enemy which deals 700% Corrupting damage to them and restores 15% of your Maximum Life.
• Modifier: Activating your Main Boss Power inflicts Nearby enemies with 200% Corrupting damage over 2 seconds.

Urivar's Lobbed Bombs

• Obtained after defeating the Initiate Lair Boss, Urivar. Requires the Vessel of Hatred expansion
• Main: After you Cast an Ultimate Skill, lob 4 bombs that deal 400% Fire damage. Gain 15% Cooldown Reduction.
• Modifier: Killing an enemy with your Main Boss Power reduces your Ultimate Skill's Cooldown by 0.2 seconds.

Harbinger of Hatred's Volley

• Obtained after defeating the Greater Lair Boss, Harbinger of Hatred. Requires the Vessel of Hatred expansion.
• Main: After damaging a Vulnerable enemy, shoot piercing projectiles that last 1.3 seconds, dealing 250% Fire damage and applying Vulnerable. Deals 40%[x] increased damage to Vulnerable enemies.
• Modifier: Casting a Basic Skill while at Maximum Resource spends it all to make all Nearby enemies Vulnerable. Activating your Main Boss Power grants 11%[x] increased Vulnerable Damage for 5 seconds.

And that’s all 24 Boss Powers in Diablo 4 Season 8 that are ripe for the taking, so long as you defeat the bosses.