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Eureka (マーク, Māku?, lit. Mark) is a magic spell in Vagrant Story. It is one of Sorcery Spells that Ashley Riot learns from a Grimoire.

Ashley learns Eureka from the Grimoire Visible, found in a treasure chest in The Miner's Resting Hall of the Abandoned Mines B1. Eureka costs 6 MP, and upon casting reveals all Traps that could be located inside a room.


Eureka is an interjection used to celebrate a discovery or invention. "Eureka" comes from the Ancient Greek word εὕρηκα heúrēka, meaning "I have found (it)".