In Season 9 of Diablo 4, you can equip Horadric Powers. How to obtain these powers and how they function is explained here on MeinMMO.

What are the Horadric Powers? You create the Horadric Powers using combinations of three components that you equip in your builds. The new powers consist of three basic building blocks:

• Catalysts are the base of your spells.
• Infusions change the type of elemental damage your spell inflicts.
• Arkana modifies the fundamental mechanics of the spell.

To build a horadric spell, you equip a main Catalyst, a supporting Infusion, and three Arkana. Each component contributes to the overall effect of the spell.

How do I learn the Horadric Powers? In Season 9, you will obtain the Catalysts and Infusions through the Season questline while you will find Arkana while exploring Nightmare Dungeons. On the PTR for Season 9, which will be open from May 27 to June 3, 2025, you will receive the components from the boost NPC Mrak.

Below, we list all Horadric Powers including their functions as announced by Blizzard as of the current date (May 27, 2025). Once the terms and functions are known in German, we will adjust the overview.

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Catalysts

These are Catalysts: The Catalysts are the main source of your Horadric spells. They basically form the foundation in terms of shape and function. Depending on where in which slot you equip them, they activate with a specific skill. You further adjust the powers through Infusions and Arkana.

Celestial Surge – Astral Magic

• Summons an oracular rune that pulls all enemies in the vicinity. A star rain follows, randomly hitting the area 20 times and causing damage.
• Cooldown: 15 seconds (11.2 at rank 20)
• Critical hit chance: 30 %
• Rank 10: Stars regularly fall around you and guaranteed hit a nearby enemy with the same damage.

Disintegrate – Arcane Magic

• Creates an arcane channel that generates a sustained beam between you and the target, continuously causing damage for 8 seconds.
• Cooldown: 10 seconds (5.3 at rank 20)
• Critical hit chance: 9 %
• Rank 10: Enemies in the beam are slowed by 50 %.

Propulsion – Arcane Magic

• Unleashes a mana explosion that causes damage and knocks back all enemies. When they collide, they take additional damage.
• Cooldown: 9 seconds (4.3 at rank 20)
• Critical hit chance: 15 %
• Rank 10: The knockback is massive. Enemies who are thrown against terrain produce a small mana explosion the first time.

Cosmic Anomaly – Astral Magic

• Passive: Manifests up to 5 anomalies that emit particles causing damage over 4 seconds.
• Active: Causes the anomalies to collapse and causes damage with each explosion.
• Appearance rate: every 5 seconds
• Critical hit chance: 20 %
• Rank 10: With 5 anomalies, you become unstoppable and the next implosion causes double damage.

Astral Pillar – Astral Magic

• Forms an ethereal pillar that taunts enemies for 3 seconds. Waves penetrate it and deal damage until you create a new one or get too far away.
• Cooldown: 7 seconds
• Critical hit chance: 12 %
• Rank 10: Taunted enemies become vulnerable and move faster.

In Season 9, you not only gain new powers to equip but also new uniques:

Infusions

These are Infusions: Infusions change the elemental damage type of your Horadric spell. This means they determine which element your spell uses – such as fire, cold, lightning, or poison. Additionally, Infusions grant an effect to the spell – and the higher the infusion rank, the stronger the effect.

Smoldering Ember

• Your catalyst now inflicts fire and/or burning damage.
• Bonus: Destroys enemy structures and has a 10 % chance to ignite the ground under opponents. This burns for 150 % burning damage over 5 seconds.
• While equipped, your fire damage bonus is as high as your highest damage type bonus.
• Rank 5: Disables the “Icy Wind” effect from monsters for 5 seconds.

Nebulous Extract

• Your spell catalyst now inflicts shadow and/or corruption damage.
• Bonus: Hit enemies deal 5-10 % less damage for 7 seconds.
• While equipped, your shadow damage bonus is as high as your highest damage type bonus.
• Rank 5: Disables the “Summoner” effect from monsters for 5 seconds.

Glacial Nimbus

• Your spell catalyst now inflicts cold and/or freezing damage.
• Bonus: Enemies hit are slowed by 15-25 % (cold effect). This effect occurs once per enemy only once per second.
• While equipped, your cold damage bonus is as high as your highest damage type bonus.
• Rank 5: Disables the “Explosive” effect from monsters for 5 seconds.

Corrosive Vapor

• Your spell catalyst now inflicts poison and/or poison damage.
• Bonus: Hit enemies suffer 150 % poison damage over 4 seconds. This effect can occur per enemy only once every 3 seconds.
• While equipped, your poison damage bonus is as high as your highest damage type bonus.
• Rank 5: Disables the “Vampiric” effect from monsters for 5 seconds.

Thunderous Particle

• Your spell catalyst now inflicts lightning and/or spark damage.
• Bonus: Hit enemies unleash 150 % lightning damage to another nearby enemy. This effect can occur per enemy only once every 3 seconds.
• While equipped, your lightning damage bonus is as high as your highest damage type bonus.
• Rank 5: Disables the “Suppressor” effect from monsters for 5 seconds.

Arkana

These are Arkana: You can equip up to 3 Arkana in 3 rarity levels (magic, rare, legendary) to modify your Catalyst. Many Arkana contain spell tags that refer to the new Horadric Gems.

Magic Arkana

• Tendrilous Bundle: Critical hit: Damage from your Catalyst has up to a 35 % chance to immobilize enemies for 5 seconds (+5 % per rank).
• Tranquil Stone: Activating your Catalyst grants you “unstoppable” for 3 seconds (+0.4 seconds per rank).
• Shifting Powder: Your Catalyst increases your movement speed during its effect and for an additional 5 seconds by 30 % (+8 % per rank).
• Luminous Gem: Your Catalyst makes enemies hit by it dazed for 2 seconds (+1 second per rank).
• Murky Essence: Activating your Catalyst grants you “Stealth” for 2 seconds (+0.4 seconds per rank).
• Invigorating Helix: Once per enemy every 5 seconds: Damage from your Catalyst grants you a boost and heals you for 5 % of your maximum health (+1 % per rank).
• Bottled Wind: Activating your Catalyst grants you a shield equal to 30 % of your maximum health for 4 seconds. After it expires, the essence is “captured” again (+4 % per rank).
• Jagged Bramble: Critical hit: Damage from your Catalyst has up to a 50 % chance to additionally inflict 130 % of your thorn damage (+20 % per rank).
• Reactive Ooze: After activating your Catalyst, your resource generation increases by 5 % per second for 10 seconds (+3 % per rank).
• Volatile Crystal: After activating your Catalyst, you gain 10 % resistance and maximum resilience against the element of your Infusion for 10 seconds (+2 % per rank).

Rare Arkana

• Gleaming Conduit: The area of effect of your Catalyst is increased by 10 % (+8 % per rank).
• Fractured Core: Your Catalyst disables auras that make monsters resistant to damage for 2.5 seconds. However, you take 10 % more stackable damage for the same time (+0.5 seconds per rank).
• Sapping Crux: Your Catalyst makes enemies “vulnerable” for 3 seconds (+1 second per rank).
• Potent Alloy: Your Catalyst destroys enemy barriers and throws them to the ground for 1.0 seconds after destruction (+0.8 seconds per rank).
• Siphoning Gizmo: Critical hit: Damage from your Catalyst has up to a 40 % chance to consume existing damage-over-time effects and instantly deal 100 % of their damage (+8 % per rank).

Legendary Arkana

Floaty Bobble

• Your Catalyst gains a special teleport effect that makes you unimpeded for 2.0 seconds (+0.4 seconds per rank).
• Effects for each Catalyst:
  • Celestial Surge: Teleports you to the center of the runes and grants “unimpeded”.
  • Disintegrate: Teleports you to the target but leaves the “Arcane Conduit” behind. You are unimpeded during the beam and 2 seconds afterwards.
  • Propulsion: Teleports you to the center of the mana explosion and makes you unimpeded. In the melee variant, to the knocked-back enemies.
  • Cosmic Anomaly: Teleports you to the implosion, removes negative effects, and grants “unimpeded”.
  • Astral Pillar: Teleports you to the target location, leaving the light pillar at the previous spot, unimpeded for 2 seconds.

Nightmare Orb

• Your Catalyst gains a fear effect that lasts for 4.0 seconds (+0.4 seconds per rank).
• Effects for each Catalyst:
  • Celestial Surge: Stars induce fear in unaffected enemies. After the effect, there is a 25 % chance that another star will fall.
  • Disintegrate: Puts enemies in fear. Killed enemies restore 5 % health and primary resource.
  • Propulsion: Removes “vulnerable” effects from enemies and instills fear in them. Then a small mana explosion is triggered.
  • Cosmic Anomaly: Anomalies add 80 % slow and instill fear in unaffected enemies.
  • Astral Pillar: Every 9th wave instills fear in enemies. Solar Flare then taunts automatically.

Frigid Heart

• Your Catalyst gains a freezing effect for 3.0 seconds (+0.4 seconds per rank).
• Effects for each Catalyst:
  • Celestial Surge: The oracle rune explodes and freezes enemies. A second rune appears after the star rain.
  • Disintegrate: Enemies hit by the beam are frozen after dodging. You gain 15 % dodge chance for twice the duration.
  • Propulsion: Enemies that collide twice are frozen.
  • Cosmic Anomaly: 20 % chance for anomalies to not dissolve, but freeze enemies instead.
  • Astral Pillar: Removing the pillar freezes enemies. Each freeze increases your critical hit chance for 5 seconds by 10 %, up to 25 %.

Pressurized Steam

• Your Catalyst gains a stun effect for 1.0 second (+0.4 seconds per rank).
• Effects for each Catalyst:
  • Celestial Surge: Stars have a 25 % chance to stun and guarantee critical hits against stunned enemies.
  • Disintegrate: Each enemy is stunned once. The stun causes double staggering against bosses.
  • Propulsion: Enemies thrown against terrain are stunned and may miss their next 2 attacks.
  • Cosmic Anomaly: Particles deal instant damage and have a 25 % chance to stun enemies.
  • Astral Pillar: Waves have a 30 % chance to stun and deal guaranteed overwhelming damage to stunned enemies.

Bloody Charm

• Your Catalyst gains an execution effect: Enemies (except bosses) with 10 % or less health are instantly killed (+2 % threshold per rank).
• Effects for each Catalyst:
  • Celestial Surge: “Moon Impact” executes enemies. Successful executions reduce cooldowns by 2 seconds.
  • Disintegrate: Instantly kills non-boss enemies below 10 %. For normal enemies (non-elite), the threshold is 20 %.
  • Propulsion: Executes enemies with the mana pulse. Successful executions reset the cooldown.
  • Cosmic Anomaly: Implosion executes enemies. Each execution increases your attack speed for 8 seconds by 20 %.
  • Astral Pillar: Sends additional waves to hit executable enemies.

Season 9 of Diablo 4 is set to begin according to the roadmap in July 2025, with an end scheduled for September. With the season comes new content in the game, but also changes to the base game. What the season mechanics are and what content is coming into the game can be found in our overview: Diablo 4 Season 9: All about release, builds and the content