Siren (item)

Siren, also known as Alarm, is a recurring item in the Final Fantasy series.

Final Fantasy IV
Siren is an item that forces the player into a battle with the rarest enemy group in the current map. It cannot be obtained in the SNES or PlayStation versions, but can be found in the Giant of Babil, Cave of Trials, and the Lunar Ruins as part of the Mech Set, won from Tunneler, Arachne, Alraune, Security Eye, Searcher, Green Dragon, and Yellow Dragon, and stolen from Security Eye and Searcher in the Game Boy Advance and later 2D versions of the game. In the 3D remakes, it can also be obtained by completing the Lunar Path West and East maps (x3 each) and the Lunar Subterrane B5 map (x3), or by buying it for 3,000 gil at the Hummingway Home.

Final Fantasy IV -Interlude-
Siren returns as an item that functions identically to its previous version.

Final Fantasy IV: The After Years
Siren is a dummied item that functions identically to its original version.