The Lohengrin Sword was the weapon Fakir used for much of the series. It first appeared in Akt 10, and was said to be the sword used by the Knight in the story of The Prince and the Raven. The sword was in Karon's care until he gave it to Fakir.
The sword was last seen in Akt 20. Fakir used it to defend Raetsel from Mytho, but Mytho knocked it out of his hands. The Lohengrin Sword was never seen again.
The sword probably gets its name from Lohengrin, a character in German Arthurian legend who was known as the Knight of the Swan.