The Horadric Vault & Spellcrafting Interface

3.1 Finding the Interface

Upon quest completion, the Horadric Spellcrafting Interface becomes permanently available in Diablo 4 Items Ked Bardu, typically located near the Occultist or Alchemist. This is where all the magic happens. It features two tabs:

Spellcrafting Tab – For assembling components into active spells.

Jewels Tab – For socketing passive Jewels into gear.

You’ll also see your inventory of owned Catalysts, Infusions, Arcana, and Jewels—along with UI prompts when you have enough materials to craft or socket new powers.

3.2 Spellcrafting Mechanics

In the Spellcrafting tab, you’ll:

Select a Catalyst (defines spell archetype).

Choose an Infusion (determines elemental damage).

Pick an Arcana Modifier (adds utility or special effects).

Preview the assembled spell with text descriptions.

Assign it to an ability slot (like a class skill).

This is where choice and customization begin in earnest.

Section 4: Gathering Components — Your Spellcraft Arsenal

Season 9 provides multiple ways to Buy Diablo 4 materials gather the necessary Catalysts, Infusions, Arcana, and Jewels. Let’s break down each material type and where to find them.