Yeeeahhhh... That was pretty lame to be frank.
I like this manga a lot, but those last two chapters that scream plot armor are quite disappointing, especially in a manga that started as a down to earth relationship between fellow adventurers who don't trust one another. I don't mind them becoming close friends, I even looked forward to it. But this seems just like a forced development full of plot armor. Somehow, even though they only started to journey together not long ago and don't know each others all that much, they can activate the sword of bond that never found a single party where adventurers were close enough to activate? That's quite the bullshit development.
I'll keep giving it a read for now, but holy fuck I hope the author doesn't stray further into this, or else I'll most likely just drop it.