Arilyn ' s moonblade Arilyn ' s moonblade was the hereditary moonblade wielded by Arilyn Moonblade , having been passed to her by her mother , Princess Amnestria of Evermeet . Description . The sword and its hilt appeared antique . After Amnestria left Evermeet , the moonstone in the hilt was removed and replaced by a modernly cut topaz stone . That was how Arilyn carried it for many decades . However , the original moonstone was restored to the sword in 1361 DR . There was Espruar writing on the sword , as well as wards to protect the runes against translation spells . All in all , there were nine runes on the sword , each one indicating an ability of the sword that the wielder had given it . Arilyn wielded the sword with two hands . . Abilities . Like other moonblades , Arilyn ' s moonblade burned anyone who attempted to touch the sword , and potentially killed anyone who attempted to wield the blade . However , in 1361 DR Arilyn placed a rune on the sword that removed this restriction so that others could touch the sword if needed . The sword would not shed innocent blood . The sword was wielded by eight of Arilyn ' s ancestors , each of whom had left with it a special power , as indicated by a rune . The moonstone in the hilt enabled each successive wielder to grant a power to the sword over a period of time . The ninth rune that Arilyn placed granted removal of the restriction that prevented people from touching the blade and getting burned ; it is implied she did this for Danilo Thann , who had been burned when he carried the sword to her . The different powers were History . Dar - Hadan was a mage who wielded the moonblade . He was the one to imbue the sword with a warning glow . Dar - Hadan ' s daughter Zoastria wielded the moonblade . In 867 DR , it was recorded by Ventish of Somlar that she was searching for her twin sister Somalee , who had vanished on a voyage at sea , and that she often used the moonblade ' s " elfshadow " ability . The moonblade then passed to Xenaphor , the oldest child of Zoastria ' s youngest brother . Xenaphor was once attacked by a red dragon ; it was he who made the moonblade confer immunity to fire on the wielder . Thasitalia was a solitary adventurer , so she gave the sword its dreamwarning ability . She was Arilyn ' s great - aunt and passed the moonblade to Amnestria . Amnestria inherited the moonblade from Thasitalia , who had been away from Evermeet . Amnestria fell in love with a human , Bran Skorlsun , and bore his child ( Arilyn ) . She imbued the sword with the " elfgate " ability to control a portal between Evermeet and Faerûn in an attempt to " unconsciously " combine her two worlds . The elves had moonblade dismantled ; Amnestria carried the sword into exile and Bran was forced to carry the moonstone so that they could never meet each other again . In 1361 DR , Kymil Nimesin attempted to obtain the moonblade for its " elfgate " ability in order to take over Evermeet . He gained control over the sword ' s " elfshadow " ability , creating the Harper Assassin that mysteriously killed people around Arilyn . The moonblade was restored and the portal opened . However , Arilyn arrived in time to defeat Kymil and Danilo Thann was able to move the portal to a safer location ( Blackstaff Tower in Waterdeep ) .