Dc's mysterious assassin

When Drystan finds himself dead and full of regrets, a powerful yet mysterious being grants him a new life in a world he barely has any knowledge of along with a few gifts. Why did he get this chance... because i said so. Deal with it. (This is my first experiance writing so dont expect flawless work. I accept critism and appreciate any and all forms of advice, suggestions , corrections, etc.) Thank you for reading : )