Diablo 4 Boss Powers
Andariel's Flaming Skull
Boss Power

After standing still for 1 second, summon a skull for 4 seconds that rotates around you and breathes fire that Burns enemies for [1200%] damage over 3 seconds.

Burning Enemies take [21%] more damage from your Damage over Time effects. For 5 seconds after activating your Main Boss Power, all your other attacks Burn enemies for [1800%] damage over 3 seconds.
Defeat Andariel (Torment 1 or higher) to unlock
Belial's Eye Beams
Boss Power

After you drink a healing potion, gain 75% Damage Reduction for 2 seconds and summon eye beams that Corrupt enemies for [1750%] damage over 3.5 seconds. Then, your Healing Potion becomes disabled for 5 seconds. You may drink your Healing Potion at full health.

Activating your Main Boss Power grants unbreakable Stealth for 2 seconds. You deal x [11%] increased Overpower Damage while Stealthed.
Defeat Belial, Lord of Lies (Torment 1 or higher) to unlock
Duriel's Burrow
Boss Power

When you Evade, you now burrow underground, immobilizing surrounding enemies for 5 seconds and dealing [200%] on your entry and exit. You deal [200%] damage every 0.25 seconds while burrowed. Evade's Cooldown is increased by 4 seconds, and Cooldown Reduction on Evade is 50% as effective.

Activating your Main Boss Power grants you + [21%] increased Dodge chance for 2 seconds. Whenever you Dodge an attack you Immobilize Nearby enemies for 3 seconds.
Defeat Duriel (Torment 1 or higher) to unlock
Harbinger of Hatred's Volley
Boss Power

After damaging a Vulnerable enemy, shoot piercing projectiles that last 1.3 seconds, dealing [400%] Fire damage and applying Vulnerable. Deals x40% increased damage to Vulnerable enemies.

Casting a Basic Skill while at Maximum Resource spends it all to make all Nearby enemies Vulnerable. Activating your Main Boss Power grants x [11%] increased Vulnerable Damage for 5 seconds.
Defeat Harbinger of Hatred (Torment 1 or higher) to unlock
Lilith's Wind of Hate
Boss Power

When you Cast a skill, attack enemies with a wave of spikes that lasts 2 seconds and deals [250%] Physical damage. Enemies take x60% increased damage from Wind of Hate each time it hits them, up to x300%.

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 [5.25%] of the Elite's Life. An Elite can have up to 3 Blisters active at once, except for World Bosses.
Defeat Lilith (Torment 1 or higher) to unlock
Ashava's Poison Breath
Boss Power

Hitting an enemy affected by Damage over Time spawns a wave of acid that deals [400%] Poisoning damage over 4 seconds. Applies 10% more Poisoning for each 1% of the target's current Life affected by Damage over Time.

Once per activation, damaging an enemy with your Main Boss Power also applies [45%] Poisoning damage to it over 3 seconds.
Defeat Ashava (World Boss) to unlock
Avarice's Explosive Ore
Boss Power

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.

Activating your Main Boss Power spends all your Primary Resource to increase its damage by x [1.5%] per Resource point spent.
Defeat Avarice the Gold Cursed (World Boss) to unlock
Beast in the Ice's Sleet
Boss Power

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.

Your Main Boss Power now Chills enemies it damages for x [2.5%].
Defeat Beast in the Ice (Torment 1 or higher) to unlock
Belial's Crystal Decoy
Boss Power

When you Cast an Agility, Defensive, or Macabre skill, spawn a crystal that Taunts enemies and explodes after 3 seconds, dealing [600%] Shadow damage.

Activating your Main Boss Power Fears Nearby enemies for [0.75] seconds and deals [50%] Shadow damage to them.
Defeat Belial in a Lair Boss ambush (Torment 1 or higher) to unlock
Grigoire's Lightning Square
Boss Power

After you cast a Core Skill, lightning tiles outward for 1.2 seconds dealing [300%] Lightning damage per strike.

Once per activation, damaging an enemy with your Main Boss Power Stuns enemies it hits for [0.25] seconds.
Defeat Grigoire (Torment 1 or higher) to unlock
Lord Zir's Blood Pool
Boss Power

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.

Activating your Main Boss Power Heals you for [5.5%] of your Maximum Life over 3 seconds.
Defeat Lord Zir (Torment 1 or higher) to unlock
Urivar's Lobbed Bombs
Boss Power

After you Cast an Ultimate Skill, lob 4 bombs that deal [800%] Fire damage and reduce your Ultimate Skill's Cooldown by 5 seconds.

Killing an enemy with your Main Boss Power reduces your Ultimate Skill's Cooldown by [0.2] seconds.
Defeat Urivar (Torment 1 or higher) to unlock
Varshan's Life Steal
Boss Power

Every time you lose 25% of your Maximum Life, attach a leeching beam to the attacker which restores [10%] of your Maximum Life and deals [1200%] Corrupting damage over 3 second to them.

Activating your Main Boss Power inflicts Nearby enemies with [200%] Corrupting damage over 2 seconds.
Defeat Varshan (Torment 1 or higher) to unlock
Wandering Death's Chest Beam
Boss Power

While Channeling a Skill, spawn a beam that deals [300%] Frostbite damage per second. Enemies hit take x50% increased damage from you for 1 second.

Your Main Boss Power instantly Executes Non-Boss enemies hit with less than [15%] Life. When you Execute enemies you gain 25 Primary Resource.
Defeat Wandering Death (World Boss) to unlock
Allek's Talons
Boss Power

Casting a Basic Skill applies [200%] Sparking damage over 4 seconds to enemies it hit.

Gain [5%] Movement Speed, increased by 0.5% for each 1% Cooldown Reduction you have, up to a maximum of [11%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Beastmaster's Training
Boss Power

Whenever you cast a Summon Skill or call a Mercenary for Reinforcement, one of your Summons or Mercenaries Taunts enemies and gains [40%] Damage Reduction.

Your Summons deal x [5%] more damage, increased by x0.25% for each 1% Bonus Critical Strike Damage you have from items and Paragon, up to a maximum of x [17%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Blackmailer's Sabotage
Boss Power

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.

Whenever you gain Fortify, additionally gain [20%] of the amount as Barrier.
Defeat this Apparition in the Apparaition Incursion event to unlock
Flesh Reaper's Disruption
Boss Power

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.

Gain x [5%] Vulnerable Damage, increased by x0.25% for each 1% of Crowd Control Duration Bonus you have, up to a maximum of x [10.5%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Hatred's Embrace's Haste
Boss Power

Casting a Shadow or Fire Skill grants [1.1%] increased Movement Speed for 3 seconds, up to [11%].

Gain + [5%] Critical Strike Chance, increased by +0.5% for each 1% of Shadow Resistance you have, up to a maximum of + [22.5%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Kirma's Sparks
Boss Power

When you Evade, apply [200%] Sparking damage over 4 seconds to Close enemies.

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%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Outlaw Sharpshooter's Eye
Boss Power

Dealing Direct Damage to a Distant enemy Slows them and surrounding enemies by [40%] for 5 seconds.

You deal increased damage to Enemies the further they are from you, up to x [10.5%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Sinerat's Flames
Boss Power

Using a Mobility Skill Burns Close enemies for [200%] Burning damage over 4 Seconds.

Gain x [5%] increased damage to all Elements. For each 1% of an Element's Resistance from bonuses, gain x0.2% increased damage for that Element, up to a maximum of x [15.5%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Skerg's Toxins
Boss Power

When an enemy applies a Damage over Time effect to you, apply [1000%] Poisoning damage to them over 4 seconds.

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%].
Defeat this Apparition in the Apparaition Incursion event to unlock
Torusk's Rage
Boss Power

Damaging a Crowd Controlled enemy makes them and surrounding enemies Unstoppable but you gain x [10.5%] increased Damage, Attack Speed, and Movement Speed for 3 seconds.

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%].
Defeat this Apparition in the Apparaition Incursion event to unlock