Updated 2026-09-27
한국어Effect
Mental FatigueMental Fatigue reduces Intelligence, Wisdom, and Charisma saving throws according to its remaining stacks.
It can support a follow-up spell requiring a Wisdom save, for example. It affects different abilities from Reverberation.
At the threshold, failing a relevant save can trigger extra Psychic damage and remove the condition. Both the stack count and the type of failed save matter.
Core rule
Saving throwsA saving throw determines whether you resist or avoid a harmful effect, such as a spell or trap.
Roll a d20 using the ability named by the effect, then add the relevant modifier and saving-throw bonuses. Meeting the Difficulty Class succeeds.
Success may mean half damage or avoiding the effect entirely. A successful save does not always mean zero damage.
Core rule
d20 rollsA d20 has twenty possible results, from 1 to 20. It is used to resolve attacks and many uncertain actions.
Add the relevant ability modifier, proficiency, and other bonuses to the die. Meeting the target number is enough to succeed.
Attack rolls, saving throws, and ability checks use different bonuses. A bonus to one does not automatically apply to the others.
Answer
When an item's specified trigger is met, it applies Mental Fatigue.
Based on in-game textConditions vary by item. Check the original passive of the item that applies it.
Answer
Each remaining stack applies a penalty to Wisdom, Intelligence, and Charisma Saving Throws.
Derived from game dataMAG_PSYCHIC_MENTAL_FATIGUEAffected entity has a -1 penalty to Wisdom, Intelligence, and Charisma
When it fails a Wisdom, Intelligence, or Charisma Saving Throw while having 5 or more turns of this condition remaining, the entity takes 1d4 Psychic damage and is no longer mentally fatigued.
Core rule
Repeated effects may grow stronger, last longer, replace one another, or fail to combine.
For conditions such as Radiating Orb, remaining turns also affect strength. In contrast, repeated resistance does not keep halving damage.
Check whether the effect stacks and whether it has a cap. A shared display name does not mean the values from every variant can be added together.
Answer
The game data below distinguishes an entry's listed duration from the duration actually applied.
Derived from game dataMAG_PSYCHIC_MENTAL_FATIGUEAffected entity has a -1 penalty to Wisdom, Intelligence, and Charisma
When it fails a Wisdom, Intelligence, or Charisma Saving Throw while having 5 or more turns of this condition remaining, the entity takes 1d4 Psychic damage and is no longer mentally fatigued.
Answer
After the threshold is reached, failing the relevant Saving Throw deals damage and removes the condition.
Derived from game dataMAG_PSYCHIC_MENTAL_FATIGUEAffected entity has a -1 penalty to Wisdom, Intelligence, and Charisma
When it fails a Wisdom, Intelligence, or Charisma Saving Throw while having 5 or more turns of this condition remaining, the entity takes 1d4 Psychic damage and is no longer mentally fatigued.
Answer
Pair it with effects that call for mental-ability Saving Throws, but do not generalize it to all Saving Throws.
Codex commentary