Well jizz magic is real to a degree, I'm sorry, I say this because I went from chronic masturbator to someone that, in all humility, is pretty successful at continence, I had no active sexual thoughts for over 200+ days, and still with regular wet dreams in which I feel drained once I experience them, have you done the same? Have you even gone 200+ days just with physical retention? Don't fool yourself, you have not, otherwise you wouldn't say this, if there's a rumour about it chances are there's a degree of truth behind it, it is probably exaggerated of course, physical retention is just scratching the surface, read the work of swami vivekananda, he realized God, he had photographic memory and an incredible mind, after his speeches people would roar in applauses, read about his "brothers and sisters of america " speech. He realized the Brahman and it wouldn't be possible without perfect celibacy, but this is an extreme case, in fact he claims he never had a single sexual thought in his life. Saying you can become God is an exaggeration, no you won't become God, you are still stuck into a physical body, but it's said if you have unbroken celibacy for over 12 years you can realize God, and you realize that you are God and within God, which is a different thing, you realize you are the Brahman, celibacy brings you closer to God hence you will get some divine qualities, which is translated into becoming similar to god.