Hi, I can't seem to remember the name of a particular novel, the main character had a system that allowed him to grab items from across the multiverse at times, similarly to fishing the myriad heavens but without a fishing pole. I recall at one point he got a turtle shell with some writing on it that taught him some technique. At another point he got a cultivation technique from a sci-fi world, which comically started off with movements from radio calisthenics. If anyone could tell me the name of this novel, it'd be much appreciated.
