A New enemy has emerged form beyond caverns.

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.—Victor Krane

After the defeat of Dr. Thaddeus Blakk sending him in the deep caverns with the dark bane. Eli Shane and his Gang had thought Slugterra can rest in peace but as they were wrong as a new threat had emerged from beyond the 99 caverns of Slugterra. The Shane Gang must stop the Dark Slinger and his marauders from taking over the 99 caverns but as his mysterious Ghouled Boon Doc called a Goon Doc's Secrete weapon which is that he can control any person just like the dark slinger. Eli must fight for his live before the Goon takes over Eli's Mind.—Nerd Corps Entertainment

After the defeat of Dr. Thaddeus Blakk sending him in the deep caverns with the dark bane. Eli Shane and his Gang had thought Slugterra can rest in peace but as they were wrong as a new threat had emerged from beyond the 99 caverns of Slugterra. The Shane Gang must not only saved themselves but also the 99 caverns of Slugterra.—Disney XD Canada