A flask of oil can fuel a lantern or intensify fire. A glass phial can be thrown as a Splash Weapon using Sling proficiency, creating a 5-foot burst. Creatures caught in the burst gain Vulnerable 5 (Fire), suffer a -2 Situation to saves against fire damage, and are more easily set aflame for 1d6 rounds. A creature can use a Master Action to wipe the oil from itself or an adjacent creature.