MMA: Magic Martial Arts [Baby Reincarnation, Progression]

Who needs spells when you have perfectly functional fists? Jonny was the king of the octagon, undefeated, and undefeatable. Then, in an attempt to rig his next match, a group of incompetent goons accidentally kills him, ending his world-class career, and sending him to an early grave... and another world.  When Jonny opens his eyes, he is the only son of a duke in a kingdom where magic is normal. There's only one problem. Well, two problems. One is that he has a rare condition that prevents him from using magic. The other is that the duke's brother wants Jonny dead. After a close shave with death, the duke has no choice but to secretly send Jonny away to an orphanage for his own safety. With luck, he would be able to have a relatively normal childhood, away from the politics and assassins of the ducal family, and later, he would be able to be "rediscovered" and brought back in. But that's not going to happen if Jonny has any say in it. He was the strongest before, and he's going to be the strongest again, lack of magic be damned. And little does he know that the very condition that prevents him from using magic might be exactly what he needs to make his dream a reality. What to expect: - Meathead MC- Realistic fight scenes (hopefully)- Not too much time spent in babyhood- No harem- Magic vs magical muscles- 0 AI use (except for the temporary cover)