Corrupt Ritual

Corrupt Ritual is the overall fifteenth episode of the How NOT to Summon a Demon Lord series. It aired on April 22, 2021.

Synopsis
Diablo must find and save Rem and Lumachina while stopping the spread of the Death Knell Curse at its source.

Characters in Order of Appearance

 * Batutta
 * Shiliu
 * Lumachina Weselia
 * Rem Galleu
 * Diablo
 * Shera L. Greenwood
 * Horn
 * Fanis Laminitus
 * Varakness

Differences from the Light Novel

 * Diablo's rampage in the city and interrogations on Batutta's goons are omitted.
 * Shiliu's petrified body was on the altar when Diablo lifted it to escape. What happened to her after is unclear.
 * Fanis fought in the nude and was equipped with a sidearm. Her arm got considerably injured.

Trivia

 * Shiliu's outfit is censored in the anime as she was supposed to be topless.