I'll give you a CS. It isn't time travel -.-' It's memories of his previous life. This modern day is the incarnation of the 16's century. He isn't immortal. Also, he's just a swordsman. No powers embedded within this character. I've just notion-ed that he has great power surging through him but in this RP/ apocalyptic world, he is just an average human who dresses fancy and is as witty as Dante. He's a swords-master solely because of his keepsake blade, from his mother down to him. Generations actually. Nothing OP. Nothing GM.