Hit the Highway
The after-party for the harvesting project was very lively, but Rino excused himself. He had big plans to work on now that he had powerful monsters under his command, mana depletion and new blueprints.
The monster rabbit clan worked very quickly, and according to the drows sent to follow them, they worked even quicker than the gnomes. It might be due to their numbers but The genesis fairies sent to lay the mana web network lagged behind so far that there was no light in the newest section of the tunnel.
Thankfully, the rabbits seemed very experienced with tunnelling and added earth columns in the tunnel they dug. The excess dirt was surprisingly eaten, and the drow who had night vision suffered some mental trauma knowing that these monster rabbits ate their excretion several times to create the best dry pellet poop used to explode tough rocks in the way.