Catalyst

This page is about the currency. For the divination card, see The Catalyst.

Catalysts are currency items that add quality to jewellery. Quality on jewellery instead improves the effect of the implicit and explicit modifiers of the specified type, depending on the modifier tags. Modifier tags can be viewed by enabling Advanced Mod Descriptions in the UI options, and then holding the Alt key (default, it matches the item highlight keybind) while mousing over the item.

Using a different type of catalyst on an item that has quality will set the previous quality back.

Catalysts are acquired by defeating metamorphs in maps with organ parts that specify that they drop catalysts.

In terms of item filter, catalyst are classified as Stackable Currency.

Prior to Version 3.15.0, quality on jewellery also increased the odds of adding a mod of the matching type when using an Orb of AugmentationOrb of AugmentationStack Size: 30Augments a magic item with a new random modifierRight click this item then left click a magic item to apply it. Magic items can have up to two random modifiers.
Shift click to unstack. or Regal OrbRegal OrbStack Size: 10Upgrades a magic item to a rare itemRight click this item then left click a magic item to apply it. Current modifiers are retained and a new one is added. or Exalted OrbExalted OrbStack Size: 10Augments a rare item with a new random modifierRight click this item then left click a rare item to apply it. Rare items can have up to six random modifiers. or Elderslayer's Exalted Orb on the item, at the cost of reducing quality (2%, 5% and 20%, respectively). Such a behaviour is deprecated now - catalysts no longer affect the chances of rolling related modifiers on jewellery, and quality on jewellery is no longer removed when crafting.

List of catalysts

Main page: List of catalysts

Vendor recipe

Result	Recipes
1x random Catalyst	3x Catalysts, all of same type

Version history

Version	Changes
3.15.0	Catalysts no longer affect the chances of rolling related modifiers on jewellery through crafting, and Quality on jewellery is no longer removed when crafting with specific Currency.
3.14.0	Added an Accelerating CatalystAccelerating CatalystStack Size: 10Adds quality that enhances Speed modifiers on a ring, amulet or belt Replaces other quality typesRight click this item then left click a ring, amulet or belt to apply it. Has greater effect on lower-rarity jewellery. The maximum quality is 20%. Shift click to unstack., which adds quality that enhances Speed modifiers on a Ring, Amulet or Belt. Added a Noxious CatalystNoxious CatalystStack Size: 10Adds quality that enhances Physical and Chaos Damage modifiers on a ring, amulet or belt Replaces other quality typesRight click this item then left click a ring, amulet or belt to apply it. Has greater effect on lower-rarity jewellery. The maximum quality is 20%. Shift click to unstack., which adds quality that enhances Physical and Chaos Damage modifiers on a Ring, Amulet or Belt. Added an Unstable CatalystUnstable CatalystStack Size: 10Adds quality that enhances Critical modifiers on a ring, amulet or belt Replaces other quality typesRight click this item then left click a ring, amulet or belt to apply it. Has greater effect on lower-rarity jewellery. The maximum quality is 20%. Shift click to unstack., which adds quality that enhances Critical modifiers on a Ring, Amulet or Belt.
3.9.0	Introduced to the game