That Time I Got Reincarnated as a Slime (vol 26)

As the Tempest Fighting Tournament continues, the most unlikely champion Gobta faces the fearsome Lion Mask! And whoever wins must fight the awe-inspiring Masayuki the Hero, whose true power even Rimuru can't grasp! Then, the visiting adventurers face a new challenge as Rimuru invites them into his brand-new dungeon, full of treasures, monsters and traps. But is being a Dungeon Master even harder being a Demon Lord?