Complex sentence: In his cabin, Twoyoungmen receives the skull of his grandfather and experiences a vision of the man.The grandfather's skull had been treated in such a way that his spirit is still connected to the earthly plane, allowing him to contact & train Twoyoungmen.
Split into simpler sentences: In his cabin, Twoyoungmen receives the skull of his grandfather and experiences a vision of the man. His grandfather's skull had been treated in such a way that his spirit was still connected to the earthly plane, allowing him to contact and train Twoyoungmen.