I forgot i think there was an animal with them also maybe q dragon? And the master had long black hair and wore a long black dress often and the mc had brunette hair
Never read anything like it but there's two comics with one-armed Mc who regresses and gets another arm, The art of reincarnation and Standard of reincarnation
Idk about the arm but everything else sounds like this https://www.mangago.me/read-manga/legendary_youngest_son_of_the_marquis_house/
Ohh I found it legendary youngest son of marquis house but thanks anyways
OMG yesss thabkuuuuu
Yo, that's a lot of pretty guys, I think I'm gonna read it too, lol
(the art was rlly amazing not ur usual manhwa type) So the mc died in a battle and even had lost an arm like he was a normal mercenary or a soldier i think
then he regresses to when he was a teen and he has a mentor too which was a woman so initially in first life he found her inside a cave locked and her strength was declining so in that situation she took him as a disciple for some reason and then in 2nd life he goes to find her first on his own and like they become master disciple again he frees her and she teaches him but he's already mastered her stuff since 1st life ah he was like illegitmate in a noble family also i think
His master aka that woman was also very famous and strong but usually remains in a small form in 2nd life while restoring her power i think