Also known as: ロンゴミニアド, ロンゴミアント, ロンの槍
The Holy Lance of King Arthur (Saber (Fate)) in the Fate series. Notably used to slay Mordred (Fate/Apocrypha) at the Battle of Camlann.
Not as well known as Excalibur (Fate/Stay Night), but it is featured in Fate/Grand Order as the primary weapon of Artoria Pendragon (Lancer) (Fate).