Blade & Bastard, Vol. 3 (manga)

"Treasure awaits in a hidden room on the third floor of the dungeon"—so claims a dangerously suspicious rumor. It's a blatant trap, but there's nothing wrong with that as far as Iarumas is concerned. With Sezmar from the All-Stars in tow, his party descends into the dungeon, seeking fortune or something greater…only to run into a blaring alarm, a swarm of monsters, and a trap set specifically for Garbage! Even though the situation is as dire as can be, Iarumas presses forward with reckless abandon. Just what is this man seeking, and will his pursuit lead him to certain doom?

Volume 3 of the Blade & Bastard manga series by Kumo Kagyu.