That Time I Got Reincarnated as a Slime (2018)

S2E21 Adalman, the Index Finger

After finishing their preparations, Rimuru sets off for Walpurgis accompanied by Shion and Ranga, while Ramiris takes Beretta and Treyni with her. Meanwhile, Shuna, Hakuro, and Soei encounter a dense fog that obscures their sight and disrupts their magical sensing as they approach Clayman's castle. Emerging from the mist is Adalman, known as the White King and one of Clayman's Five Fingers. As Hakuro and Soei fend off the surrounding foes, Shuna prepares for a direct confrontation with Adalman.