The Graal is one of a long line of krogan weapons used to hunt thresher maws. Its ammunition consists of oversized flechettes meant to pierce thresher hide and create deep wound channels leading to massive blood blood. For additional firepower, the weapon is double-barreled, and, as a last resort, possesses blades to cause internal injuries if the wielder is swallowed by the thresher. Using a Graal on a humanoid target has predictably grisly effects. Its shots can be charged for more damage.