If you are aiming to frequently Stun enemies and gain an edge, here is how you can acquire Pressurized Steam in Diablo 4 Season 9.

Pressurized Steam is one of the five Legendary Arcana for Horadric Spells, introduced in Diablo 4 Season 9. Arcana serves as one of the core elements of Horadric Spells alongside Catalysts and Infusions.
Combine and mix these three components at the Horadric Spellcraft menu to create personalized spells with distinct effects. Pressurized Steam grants specialized Stun effects to your Catalyst, providing you with a tactical advantage against enemies. Find out how to acquire and use the Pressurized Steam in Diablo 4 Season 9.
Related: Diablo 4 Season 9: How To Get Frigid Heart
How To Obtain Pressurized Steam in Diablo 4
While obtaining Catalysts and Infusions is tied to the Season 9 seasonal questline progression, Arcana is obtained through different means. To acquire the Pressurized Steam Arcana, clear Horadric Strongrooms and open the reward cache. Since Pressurized Steam is a Legendary Arcana, you must reach Tier 6 Horadric Knowledge to obtain it as a Horadric Strongroom reward.
How To Use Pressurized Steam in Diablo 4

While a Horadric Spell can only have one Catalyst and one Infusion equipped, you can equip up to three Arcana. Equipping the Pressurized Steam in an Arcana slot grants the Stun effect for your Catalyst for 1 second(s) (+0.4 seconds per rank). Additionally, it also offers the following distinct effects for different Catalysts:
- Celestial Surge: The stars from the Celestial Surge have a 25% chance to Stun enemies. Additionally, it deals critical damage against Stunned enemies.
- Disintegrate: It inflicts Stun effect on each enemy it damages one time after being invoked. Moreover, the Stun also deals 100% more Stagger to Bosses.
- Propulsion: The enemies are slammed into the terrain followed by being Stunned. Additionally, they have a chance to miss their next two attacks.
- Astral Pillar: The Astral Pillar waves have a chance to Stun enemies for 1 second. It also Overpower Stunned enemies.
- Cosmic Anomaly: The Anomaly particles deal instant damage while having a 25% chance to Stun.
The Pressurized Steam can be upgraded up to Rank 5 using Horadric Phials at the Horadric Spellcraft menu.
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