Darkness potions are sold at Saman's alchemist shop in Betancuria North during Part 1 in a tenpacks at an aproximate price of 1200 gp for a tenpack. They create magical darkness (identical to Darkness spell), which can only be pierced by Ultravision or True Sight, and which lasts for 3 rounds. Everyone found in an area of the darkness effect is considered to have a concealement of 50%and every attack made in the darkness against somebody who doesn't have Ultravision or True Sight is considered a sneak attack.