Effectors

Or simply put, adding custom logic at runtime to statically defined status effects.

Looking at BaseStatusEffect.BerserkPlayer in WolvenKit, in its 2nd packages then down in its effectors'' first entry, there's a BaseStatusEffect.BerserkPlayerSFXEffector whose effectorClassName is PlaySFXEffector.

Looking into game sources, there's indeed a PlaySFXEffector (which extends Effector/IScriptable), which allows for tweaking e.g. the effect at runtime based on conditions:

public class PlaySFXEffector extends Effector {
  // ...
  protected func ActionOn(owner: ref<GameObject>) -> Void {
    this.m_owner = owner;
    if !this.m_startOnUninitialize && IsNameValid(this.activationSFXName) {
      if !this.m_unique {
        GameObject.PlaySound(this.m_owner, this.activationSFXName, n"PlaySFXEffector");
      } else {
        GameObject.PlaySoundWithParams(this.m_owner, this.activationSFXName, n"PlaySFXEffector", audioAudioEventFlags.Unique);
      };
    };
  }
}

Here's another example with similarly designed status effect, ElectrocutedSFX, in WolvenKit: