Nathanial has an imagination like no one else before him. He can see and imagine things you couldn't even in your wildest dreams. This causes him to have a slight issue with telling reality from pretend, but that is only a slight downside to what other powers he has gained. He can physically alter his body to reflect any creature he chooses to create. Though most of the time he chooses to become a large beast with horns and fur he nicknamed, Grundy.