Barbed Spear that Pierces with Death
Cu Chulainn (Fate/Stay Night)'s main weapon in the Fate (Series) series. A long red Spear with an ability to guide itself into piecing the target's heart when commanded.
Also used by his teacher Scathach (Fate), who wields two of them when using her Noble Phantasm, Gae Bolg Alternative.
Not to be confused with Gae Dearg (Fate).
Humorously pronounced as "Gay Bulge" in the English dub of the DEEN anime.