Some skills allow you to specify an effect. There are 3 types of effects in LegendQuest, Potion, Visual, Custom and Label.
The following potion effects can be applied, applying the potion effect for the duration of the skill.
These effects are visual in nature, mainly producing specific particle effects.
These effect produce a custom effect for LegendQuest.
The label is a lie! Or rather it is for now, as yet the mechanism exists for these but none exist. They would be labels for status affects that skills can apply and remove, but would otherwise have no effect beyond what their skills apply.