A Haunting in Glass: A Shadowdark Adventure

The wizard's experiment failed, his tower and guests frozen in moonlight. Now a ghostly song fractures the moon-glass halls.
 
A Haunting in Glass is a mind-breaking level 3-5 horror adventure for Shadowdark RPG set in a moon-glass tower possessed by a lunar horror. 
 
Will your players press their luck and plunder the crumbling tower? Can they save the frozen guests before their minds are devoured? Or will they accept the dark deal of the devilish force trapped within?