This material is challenging. Lennart Green is a card master and his unique thinking really shines through. I remember watching Lennart Green on World's Greatest Magic 4. What he does honestly looks impossible and at first trying to execute it might feel that way. Unfortunately this video is the weakest of them all. Fractal Harmony is interesting but not my style. For the sake of completeness you may want them all, but otherwise just stick to video 1 and 2