Hat of Fire Acuity is an uncommon hat that grants the wearer 
whenever they deal 
Fire damage.
It is said some wizard hats grant the power to keep your head cool - both literally and figuratively.
Properties
Helmets 
Rarity: Uncommon
Weight: 0.5 kg / 1 lb
Price: 90 gp
Special
The wearer of this item gains:
- Fire Acuity: Whenever you deal Fire damage, you gain
for 2 turns.
- Affected entity has a +1 bonus to its spell
Attack rolls and spell save DC for each remaining turn. - Reduce the duration by 2 each time the entity takes damage.
- Arcane Acuity has a maximum
Duration: 10 turns.
Where to find
Carried by a weird ox next to Dammon in Last Light Inn, Chapter Two.