Chosen by the Gods, Emiya Shirou Descends Upon Chaldea

My name is Emiya Shirou. I've been away from Earth for so many years, I don't even know how many.

When I was seventeen, one winter, I apparently fell asleep in a warehouse. When I woke up, I was somewhere completely unfamiliar.

But with the help of a kind mage, who was also the culprit behind sending me to another world, I became a mage myself.

My current job is chosen champion of a goddess of magic who has an average tenure of six hundred years. I've got another seven or eight hundred years before retirement.

But one day, I opened and closed my eyes, and I was back at the mansion my old man had left me.

Humanity's foundation has been incinerated?

So I have to save the world again, huh? I've done this job plenty of times.

My name is Emiya Shirou. My life's ambition is to become an ally of justice and make sure no innocent person ever has to cry again.

This book is also known as The Max-Level Mage Emiya Shirou Returns from DND and The Protagonist's Rolls Are So OP, There's No Way to Keep Writing This Book.

(Artoria Pendragon is the sole female lead.)

References: ADND2e Book of All Magic 1.0, DND3r Spell Compendium 1.16, DND5e Spell Compendium 1.51