Majutsu wo Kiwamete Tabi ni Deta Tensei Elf, Moteamashita Jumyou de Ikeru Densetsu to naru

This the long tale of a reincarnated elf who become a living legend! After his ordinary life came to an end in an accident, Minoru was reincarnated as an elf who have a average lifespan of 1000 years. Due to the regret of not being able to do anything in his previous life, he decided to leave his village and travel in this life to leave behind evidence that he once lived in this world. However, the head of the elf clan imposes a certain trial—!?