Yawn. Odessa has the largest, or one of the largest catacomb systems on the planet.

It could become almost impossible to control. Not necessarily impossible to invade. But controlling it could take much much longer. The entire time resistance. They're not attacking it outside of the continued bombing of supply lines, supplying counter offensive towards Kherson, or its weapon dumps, still fortified against costal approach, but are wearing away at city defenses. However they're nowhere near to surrounding it. As far as controlling it, it will take far more numbers, numbers possibly under conscription now. But a long time away. Numbers that formerly never gained control of Kharkiv and now are being flanked in the North East.

Nope, a few bombs on Odessa is exactly what? Nothing else. Or send in the amphibians. Haha, Zday. Yea, no. Not yet. Russia tends to encircle stuff first.