Black Dragon Clash

Black Dragon Clash is the overall seventeenth episode of the How NOT to Summon a Demon Lord series. It aired on May 6, 2021.

Synopsis
Diablo and Horn must catch up to the rest of the party and finish conquering the dungeon.

Characters in Order of Appearance

 * Shera L. Greenwood
 * Rem Galleu
 * Lumachina Weselia
 * Diablo
 * Horn
 * Gewalt
 * Rose

Differences from the Light Novel

 * Diablo burned Horn's clothes, leaving her with only her utility belt.
 * Parts of Horn's backstory are omitted.
 * The black dragon provided more knowledge that may be considered spoilers.
 * Ifrit was able to visibly damage the dragon somewhat before being defeated.

Trivia

 * Diablo's dungeon does not have any bathrooms.
 * Shera's equipment were already rare and upgraded to the max, explaining why she only got Tempest Arrows.