![A hardcover D&D book titled "Dungeon Master's Guide" in bold, white Times font. Below it is a painting of a lich, an undead and very powerful magic-caster who has risen themselves from the dead. From their fingertips flows purple, smoky streams of magic that sink into the body of a plate-armored person. The fighter's eyes glow the same purple as they bare their teeth and stand from the ground at the lich's feet, supposedly raised from the dead or enthralled to do the lich's bidding. Behind them is a vague scene with ruin walls obscured by darkness and drifting smoke or steam. A hardcover D&D book titled "Dungeon Master's Guide" in bold, white Times font. Below it is a painting of a lich, an undead and very powerful magic-caster who has risen themselves from the dead. From their fingertips flows purple, smoky streams of magic that sink into the body of a plate-armored person. The fighter's eyes glow the same purple as they bare their teeth and stand from the ground at the lich's feet, supposedly raised from the dead or enthralled to do the lich's bidding. Behind them is a vague scene with ruin walls obscured by darkness and drifting smoke or steam.](https://cdn11.bigcommerce.com/s-2ft8dacd7r/images/stencil/300x300/products/3066/3090/81cw5IcoM_L._AC_UF8941000_QL80___11397.1695940418.jpg?c=1)
Deep in the Underdark, where the gloom is only broken by torch or mushroom glow, trouble is brewing...
The Archmage of Menzoberranan, Gromph Baenre, has cast a spell to harness the ambient magic of the Underdark to open portals - and he was not prepared for what was waiting on the other side. Stop Baenre's spell and close the portals before the abyssal creatures he's summoned wreak any more havoc!