Catalyst’s Status Mod Power Generation Effect
With the release of the Pre-DLC Patch for Subject 2923, Catalyst has been reworked from it’s previous use as a trait that increased chances of proc effects, to a bonus to mod power generation when attacking enemies affected by a status effect. This change is significant, as it makes using status effects on bosses and other tough enemies much more powerful, and able to better feed mod usage.
This benefit seems to apply to either ranged or melee attacks, meaning that taking along a mod or weapon that can cause Burning, Bleeding, Corrosive or one of the other statuses, is definitely worth doing. Overall the bonus is comparable to the one granted by the Cultist armor.
How to Find the Catalyst Trait
Catalyst is obtained by defeating either The Thrall or Canker dungeon bosses found in Corsus. You can find this boss in the Mire Hollow, which is connected to the Drowned Trench dungeon. Upon killing Canker for the first time, the passive trait will automatically unlock. This can be done in either Story or Adventure Mode.