In Ghoul from Beyond, a new danger emerges from beyond the 99 caverns, and Eli and the Shane Gang rush to the rescue. But nothing can prepare them for what they encounter: a Slug that can do something no one in SlugTerra has ever seen - or heard - a Slug do before! Traditional SlugSlinging no longer applies - Eli will have to engage in a very different kind of duel to save SlugTerra...and himself.