Eureka Key FFIII Art
The key that opens the way to Eureka.

The Eureka Key (エウレカの鍵 or エウレカのカギ, Eureka no Kagi?, lit. Eureka's Key), also known as EurekaKey, is a recurring item in the Final Fantasy series.


Final Fantasy IIIEdit

Eureka Key is a key item, which is required to open the way to Eureka, an area located within the Crystal Tower that houses the most powerful weapons. It can be obtained by defeating Doga and Unei at Doga's Grotto

Final Fantasy Brave ExviusEdit

FFBE Eureka Key
FFTA Buster SwordThis article or section is a stub about equipment in Final Fantasy Brave Exvius. You can help the Final Fantasy Wiki by expanding it.