Fate/Grand Order -Epic of Remnant- 亜種特異点IV 禁忌降臨庭園 セイレム 異端なるセイレム

It happened suddenly... without warning. It snuffed out all the light of the land, and it enveloped an entire town under the cover of night. Such a phenomenon could only be described as... darkness. The enormous, malicious magical energy emanating from within the darkness bears a strong resemblance to the shadow of one of the Demon Gods who attempted the Incineration of Humanity. What will become of this heretical land when the causes of this evil are eradicated? This is the adaptation of the Epic of Remnant Chapter 4 from the mobile game, Fate/Grand Order.