• Diablo vows to end the Death Knell Disease curse
  • Diablo and company are attacked by Ramnites and his army
  • "How Not to Summon a Demon Lord Omega" Season 2, Episode 4 is set to air Thursday

Diablo, Rem Galleu, Lumachina Weselia and Shera L. Greenwood head toward the dungeon that houses the cure for the deadly Death Knell Disease. However, they will come under attack in "How Not to Summon a Demon Lord Omega" Season 2, Episode 4.

The official website released the spoiler stills and synopsis for the upcoming episode. Ramnites and his army are set to attack Diablo and company. Later, Diablo and the others manage to reach the entrance of the dungeon but the bruises that appeared on Lumachina's body due to the curse have increased to six.

In the previous episode, Rem and Lumachina meet the head, Paladin Batutta, who reveals the Death Knell Disease is not an illness but a curse.

Before Rem and Lumachina could find out more, they pass out. It turns out that Batutta has drugged them.

Meanwhile, Diablo and Shera learn about Rem and Lumachina's abduction.

Batutta and his evil intentions are finally revealed as he prepares to sacrifice Rem and Lumachina in an underground dungeon. Batutta has the concentrate that causes the Death Knell Disease, which is produced from the essence of evil. He adds he wants to produce a stronger concentrate of the curse and target only one person – Laminitus.

Before Batutta can execute his plan, Diablo and Shera attack the villain's hideout. Diablo recalls in the Cross Reverie game that Batutta's place is where the Death Knell Disease rules.

Diablo tells Batutta he is the Demon Lord from Another World but for some reason, the latter is not willing to buy the former's claim. Diablo demands Batutta to release his friends or fight him.

The cast of the anime includes Azumi Waki as Rem Galleu, Yū Serizawa as Shera L. Greenwood, Masaaki Mizunaka as Takuma Sakamoto/Diablo, Chinatsu Akasaki as Fanis Laminitus, Aoi Koga as Rose, Miku Itō as Lumachina Weselia, Fumiko Uchimura as Horn, Emiri Katō as Edelgard, Atsumi Tanezaki as Klem, Rumi Okubo as Sylvie, Sayaka Senbongi as Celestine Baudelaire, Ryotaro Okiayu as Emile, Yumi Hara as Alicia Crystella and Yūka Morishima as Mei.

Fans can watch "How Not to Summon a Demon Lord Omega" Season 2, Episode 4 online on Crunchyroll this Thursday. The episode will live stream in Japanese with English subtitles. Funimation will stream the English dubbed episodes of the current season.

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