Espionage experts or not, Rino was forced to acknowledge the prowess of those killer bunny monsters. In a different sense, they were terrifying.
The highway was dug and built so quickly that Rino missed his nap time after Sheila's drow escort reported the deed was completed. On top of digging fast, those monster rabbits ran fast too. Even for Rino, he needed a few days to fly from Town Zera back to Noir Province. However, these killer bunnies were able to dig their way over in one and a half days and run back in half a day.
The genesis fairies working on laying the mana web array were stumped when they saw the group who went forward return to report that the job was done. The drow escort found it hard to keep up with their pace, even with short teleportation magic.