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How to Play Vex in Borderlands 4

Vex combines Siren phase energy, summons, and weapon-linked elements. Learn how to choose a skill style, carry elemental options, and stay mobile.
WorldBorderlands 4 Length2 min Posted Quest giverVGSources Team

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Play Vex by matching her phase-powered action skills to your equipped weapon’s element, choosing a skill-tree direction that suits your preferred combat style, and staying mobile. Carry weapons with different elements so you can switch when an encounter calls for a different effect.

What kind of Vault Hunter is Vex?

Vex is Borderlands 4’s Siren Vault Hunter. Her combat identity centers on phase energy and summoned allies, while her equipped weapon’s element connects to how her action skills resonate. That makes weapon selection part of her skill use, not just a way to deal damage between abilities.

How does Vex’s element mechanic work?

Vex’s action skills resonate with the element of the weapon she has equipped. The official gameplay showcase gives shock, incendiary, and cryo as examples. Carry weapons with different elements and switch to the one that best fits the enemy or situation; changing weapons also changes the element tied to her action skills.

The available official material establishes this elemental link, but does not specify every interaction or matchup. Use the in-game descriptions and combat feedback to decide which element to bring to a particular fight.

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Which Vex action skill and skill tree should you choose?

Each Vault Hunter has three action skills and three skill trees. The useful starting point is the style you want to play, rather than chasing a supposed universally best Vex build: pick the action skill whose combat feel appeals to you, then invest in skills that support that approach.

  • If you want phase abilities to define your fights, choose skills that reinforce the action-skill approach you enjoy.
  • If you like having summoned allies involved, favor the options and upgrades that support that style.
  • If you prefer to contribute more directly with your guns, build around the action skill you can use comfortably while continuing to shoot and reposition.

These are ways to frame your choice, not verified rankings of Vex’s action skills. Compare them by preferred combat range, how much you want to rely on summons, elemental flexibility, and how much of your damage you want to contribute with weapons.

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How should you handle weapons and movement in a fight?

  1. Bring elemental variety. Keep weapons with different elements available so you can change the element linked to Vex’s action skills when the encounter calls for it.
  2. Use the action skill that fits your approach. Build around the ability you want to use, rather than spreading investment without a clear playstyle.
  3. Keep moving while you apply pressure. Borderlands 4’s movement toolkit includes gliding, dodging, fixed-point grappling, and double jumping. Use these to change position, avoid attacks, and find a useful angle for weapons and skills.
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What is known about Vex balance?

Official 2K update notes dated October 2, 2025 reported increases to some Vex skill damage values, including a 16.6% increase to Incarnate phase-explosion damage and a 21.9% increase to Rabatzi damage. These are patch adjustments from that date, not measures of current performance.

Notes dated October 16, 2025 also included a pet critical-chance fix and a change to Vex bleed classification. Those dated notes do not establish the live balance state in 2026. For exact damage, cooldowns, or current build decisions, rely on the skill text in your current game and the latest official patch notes rather than treating older values as current.

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  • BE A BADASS: Become an unstoppable force of battle, blasting through enemies with an all-new arsenal of outrageous weaponry. Move across the Borderlands like never before—double jumping, gliding, dodging, grappling, and more—dealing death from every direction. Explode each encounter with devastating Action Skills that unleash your Vault Hunter's unique abilities. Craft your perfect build with branching skill trees and a deep, rewarding loot chase full of wild weapons and powerful gear.
  • FIGHT SOLO OR CO-OP: Wreaking havoc across Kairos is awesome alone and even better with friends in 2-player splitscreen or up to 4-player online co-op.** Borderlands 4 is designed for co-op from the ground up; whether you're hunting for loot, tackling missions, or wandering freely, level scaling and individual difficulty keeps the party together and having fun.
  • LESS BORDERS, MORE LANDS: Freely explore a vast and dangerous world rife with warring factions. Hop on your hover bike and ride through lush fields, towering peaks, and deadly deserts full of fearsome enemies, dynamic events, and engaging quests with unforgettable characters. Unite the people of Kairos and ignite a revolution, tackling this adventure however you see fit in a seamless Borderlands experience.
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  • FIGHT SOLO OR CO-OP: Wreaking havoc across Kairos is awesome alone and even better with friends in 2-player splitscreen or up to 4-player online co-op.* Borderlands 4 is designed for co-op from the ground up; whether you're hunting for loot, tackling missions, or wandering freely, level scaling and individual difficulty keeps the party together and having fun.
  • LESS BORDERS, MORE LANDS: Freely explore a vast and dangerous world rife with warring factions. Hop on your hover bike and ride through lush fields, towering peaks, and deadly deserts full of fearsome enemies, dynamic events, and engaging quests with unforgettable characters. Unite the people of Kairos and ignite a revolution, tackling this adventure however you see fit in a seamless Borderlands experience.
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