I'm going to call anyone who uses "powercreep" and other battle-shonen jargons as tourists. go away, tourists.
so my actual impression of the chapter. first, the Land who has been with Ubel since the beginning of the chapter turned out to be a clone all along. That's why he didn't die when he was crushed by the building. and knowing his cautious personality and how he always makes at least 2 clones like during the first mage exam, I think it is possible that while his real body is with Ubel to protect her, his other clone is going back to Serie to deliver the retrieved document/information. There is also a possibility that one clone is already with Serie to act as comm device, since Land can relay information between clones in real time. I simply don't believe that he only has that one clone prepared.
second, Ubel is a beast for being able to fight while her vision and mana detection being impaired. and seems like her magic doesn't depend on her vision, but her belief/visualization (because while blinded, she's able to cut through stones but not the iron street lights). so maybe her homeland has a stone quarry but not iron grinder, that's why she can't visualize cutting iron. and because the enemy messed with her mind by saying that the rope is made of iron, I think she's already lost/can't make herself believe otherwise even though by feel alone she should have known that it's made of normal rope.
third, Land has a history/connection with the Special Forces. in his flashback, he was hiding and his grandma faced the Special Forces. since Kanone is the vice/deputy, maybe the one in his flashback is the captain/leader of the forces. and since he said his grandma died of old age, that means the confrontation in his flashback ended peacefully. but that means his grandma negotiated with the Special Forces to let them go.
fourth, as I said before, it seems it will still take a while until Ubel can empathize with Land. as long as she treats her own life and others' life lightly, she wouldn't be able to empathize with Land. and their relationship has deepened in this chapter too. usually it was only Ubel who's asking questions, but now Land also showed interest in her life story: why is she treating her own life lightly?
five, if my theory about Land's clone is right, Serie would already have the information that Land and Ubel are captured, and help will be on the way. OR it's prison break time for Land and Ubel.