Borderlands 4: How to Get the Teen Witch Class Mod for Vex (Radix Drop Guide)

The Teen Witch class mod in Borderlands 4 is one of the most powerful legendary mods available for the Vault Hunter Vex. Unlike standard class mods that only boost passive skills, this legendary mod completely transforms her survivability, turning her into a near-indestructible tank during tough boss fights and mob encounters.

If you’re wondering where to find the Teen Witch class mod in BL4 and how to beat Radix to farm it, this guide has everything you need.

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Why the Teen Witch Class Mod is Special

The Teen Witch is far more than a stat booster—it changes how Vex’s lifesteal works in battle. Its unique perk, “Top That!”, allows her to sustain herself and gain extra protection even when she’s already at full strength:

·         At max health: Lifesteal heals Vex’s shield instead of being wasted.

·         At max shields: Lifesteal grants her overshield, letting her absorb even more incoming damage.

This effectively means no lifesteal ever goes to waste. Vex becomes an endurance machine, thriving in long boss battles and high-damage mob fights.

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Teen Witch Class Mod Location in Borderlands 4

You can farm the Teen Witch legendary class mod from Primordial Guardian Radix, found in the Primordial Vault: Arch of Radix within Cascadia Burn.

·         Drop Location: Arch of Radix (Primordial Vault), Cascadia Burn

·         Boss: Primordial Guardian Radix

·         Loot Pool: Teen Witch class mod (exclusive drop for Vex players), plus other legendary gear

Unlocking the Arch of Radix

Before facing Radix, you’ll need to unlock access to the Arch of Radix vault:

1.      Collect three Vault Key Fragments hidden across Cascadia Burn of Kairos.

2.      Progress through the story missions in Cascadia Burn until you can access the vault.

3.      Once inside, prepare for a multi-stage boss challenge before reaching Radix.

Radix Boss Fight Guide (Cascadia Burn)

Radix is the toughest enemy in Cascadia Burn, and farming him for the Teen Witch Vex class mod takes patience. Here’s how to deal with him:

Arena Challenge

·         You’ll need to clear three arenas filled with Synth Armatures, Thunderheads, Witnesses, and Suppression Platforms before facing Radix directly.

·         Dying means you’ll restart from the current arena only, not the entire challenge.

Radix Weaknesses

·         Shock Damage

·         Corrosive Damage

Bring weapons with both elements to deal maximum damage. Aim for the red fangs on his face, which are his main weak points.

Battle Tips

·         Flash Pangolins: Radix spawns these smaller mobs—use them for Second Winds if you go down.

·         Ammo Refills: White markers on the ground restore ammunition, so keep an eye out mid-fight.

·         Lightning Phase: After each health bar, Radix casts an arena-wide lightning attack—dodge or hide to avoid huge damage.

Radix has three full health bars, making this a lengthy fight. Stay patient, use elemental weaknesses, and keep shields high.

Farming the Teen Witch Mod

Once you defeat Radix, he has a chance to drop the Teen Witch class mod for Vex. The drop rate isn’t guaranteed, so you may need to farm him multiple times. Like most legendary farming in Borderlands 4, persistence pays off—this mod can make or break a Vex build.

Why You Need the Teen Witch for Vex

If you’re running Vex in BL4, the Teen Witch legendary class mod gives her unmatched sustainability. By turning lifesteal into shield and overshield, you’ll have the durability to handle even the toughest bosses.

Whether you’re farming mobs, grinding endgame raids, or tackling Radix himself, this mod should be at the top of your farming list.

The Teen Witch class mod in Borderlands 4 is a game-changer for Vex players. To get it, you’ll need to take down Radix in Cascadia Burn, endure his three-phase fight, and farm until he drops it. While it takes effort, the reward is worth it—this mod makes Vex one of the tankiest Vault Hunters in the game.

So if you’re wondering how to get the Teen Witch class mod in Borderlands 4, your answer is simple: head to Radix’s vault, fight smart, and keep farming until it drops.