From the PDF introduction A Web Enhancement for Deep Horizon The DUNGEONS & DRAGONS adventure Deep Horizon is the sixth of eight adventures designed to take character from the beginning to advanced levels of play. This mini-adventure can be added easily to any campaign or used when playing with the Deep Horizon adventure, and it should work nicely with a group of four PCs of about 13th level. You will need a copy of the Deep Horizon adventure to run the desmodus, however.