The key that opens the way to Eureka.
III 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
This article or section is a stub about equipment in Final Fantasy Brave Exvius. You can help the Final Fantasy Wiki by expanding it.
Retrieved from "http://finalfantasy.wikia.com/wiki/Eureka_Key?oldid=2877791"