The Fiskerton Stone is a large stone that was first seen in Cryptid vs. Cryptid. The Fiskerton Stone was found in Kur's tomb after V.V. Argost tricked the Saturday family into clearing the way, as a Rakshasa was blocking the entrance into Kur's tomb.
V.V. Argost took the stone back to Weird World and had Rani Nagi explain the stone to him. Rani explained that the Lemurians, Fiskerton's kind, can locate Kur by their instincts.They are known as Kur Guardians.