Original Title: ラディアン
Seth is a boy who seeks to become a great magician, and a group of witches who seek to travel to the Radiant. Radiant is a mythical land that spawns monsters called "Néméses" which fall to the world from the sky. While traveling, they are also hunted by The Inquisition.
Radiant - watch online: streaming, buy or rent
Currently you are able to watch "Radiant" streaming on Crunchyroll or for free with ads on Crunchyroll.