Apostles of Lumuria

The Apostles of Lumuria are an enigmatic and powerful Dark Guild that is, currently, seeking a rare Potion called the Elixir of Rage, which amplifies the drinker's physical ability, allowing them to use more of their physical strength and exert more speed and adrenaline. However, at the cost, their minds become feral. Distinction between friend and foe are lost, and the exertion on their bodies is too much for their muscles and nerves, damaging them. Why this guild seeks this treasure is unknown.