[Vast Desert Near The City of Anvil]
Anti-climatic, a term used to describe something that is disappointing or underwhelming because it doesn't live up to expectations or the build-up that preceded it. It's often used to describe events, experiences, or endings that fall short of what was anticipated. That kind of feeling was what everyone in the hero party had felt when the huge sandworm suddenly left the premises after tanking a few strikes from them.
"Was that it?" asked by Fujino
"That was kind of anti-climatic isn't it?" asked by Hino
"It is, i didn't expect that it would retreat just like that when it was literally tanking our attacks" confirmed by Takahashi
Hearing that, Ban suddenly felt worried, as she faced Sato and asked
"Sato! what do you think?"
"I... I don't know"