I need help, a book aka a novel where the mage or whatever is the best and then one day when walking out of the office after a war he passes out and gets recarnarted as a kid, at age 15 he gets a thing called a lux and goes to military school but he has all his memory he had before so spells and all is fine, he meets a few people but during the exam he didn't take so he goes to rank F class where a teacher trys and uses magic because the kid wanted him to teach but before he does the recarnarted mage holds a gun to the teacher head the teacher stops and then he asked everyone to exit he then asked the teacher y he did that but the teacher trys to use magic and attack him so he shoots him in the leg and after the commotion the friend or aka Jake thanks him for saving him I NEED TO KNOW THE NAME PLS

now we know who he takes after, but fr y'all thought if he couldn't move his hand he could legit just say heal right hand and bam healed like he said faster and he got faster