The Sacred Twins (双聖器, Sōseiki lit. Twin Holy Weapons) are two legendary weapons unique to each nation in Fire Emblem: The Sacred Stones. They were all used by the legendary Five Heroes in battle against the Demon King. With the exceptions of Latona and Gleipnir, all the Sacred Twin weapons deal bonus damage to monsters. All can only be used by a character who has S rank in the weapon type, except for Sieglinde and Siegmund, which can only be used by Eirika and Ephraim.