Stygia is a type of currency in WoW Shadowlands that can be exchanged with trader Ve'nari (46,41) for some useful items and upgrades. Stygia is earned from killing enemies and from completing quests in the Maw. If tour char die in the Maw, you will lost ~20% of Stygia, but you can still retrieve the lost Stygia by walking back to your char's corpse and looting it.