Sieglinde is a sacred Sword that hails from Fire Emblem: The Sacred Stones and Fire Emblem Heroes. Also called the Thunder Sword, Sieglinde, alongside the Flame Lance Siegmund, is one of the Sacred Twins of Renais, and is solely usable by Eirika. Like most of its counterparts, Sieglinde has the ability to inflict effective damage against monsters. This sword is, alongside its sister weapon, introduced after the battle against Orson in Chapter 16. After taking the Sacred Stone of Renais…