When used in World of Warcraft, BL can mean one of two things. Most commonly it refers to the Shaman skill Bloodlust. Acquired at level 70, BL increases the attack and cast speed of all raid members by 30% for 40 seconds. BL can also refer to the Blasted Lands, although less often. The BL WoW term definition is known by virtually all raiders and PvPers as well as most people who have Shamans high enough to use it.