Re:ZERO -Starting Life in Another World-, Vol. 8 (light novel)

"Having overcome the ferocious battle with the fearsome White Whale, Subaru Natsuki returns to the Mathers domain. With the subjugation force that overcame the deadly combat, and the addition of Julius, their common history reconciled, together they clash with the Witch Cultists under the command of Bishop of the Deadly Sins, Petelgeuse Romanee-Conti."--provided by publisher.