So, in random order …
1. Maskirovka, deploying numerous 3rd line armour/vehicles from storage to the Border, bereft of ammunition and trained crew, to pose a threat. While burning US/NATO cash/resources in response. Achieves animosity for no benefit.
2. Overt preparation for Invasion. Not subtle, but a clear expression of perceived capability. Risk of Western response, but unlikely to generate all-out warfare. Vlad got away with Crimea, try again?
3. Diplomatic leverage. The everlasting Russian fear of non-aligned or non-subservient states/NATO on its Borders. Political manoeuvre by Vlad the Great to seal his legacy with the people? Is this an internal or external ploy by Vlad?
I am not placing any bets on the outcome, but with the insanity of Belarus lurking to the north I could visualise Vlad giving it a low-level attempt. Reports are suggesting covert RU forces are already in Ukraine. Look at the map from Vlad’s POV.