Magmaw's Fissure is a large, lava-filled cave on the west side of the Broken Hall of Blackwing Descent with ruined dwarven structures on its outer edge. It is the lair of the huge lava worm, Lua error in package.lua at line 80: module 'Module:Factiongfx/faction_tip_link.json' not found. Magmaw.