Duplicate Key to the Emiya Household

Description

Duplicate Key to the Emiya Household (FS/S77-E038) is an Event from the Fate/stay night [Heaven's Feel] Vol.2 expansion. As a 0-cost green Event, it functions as a one-use effect card played from hand during a match. Its role is to provide a short-term tactical option for the player, typically enabling a game-state change when played.