If the DPRK gets in this mix the US will unleash. Drones are checkers, MOABs/JDAM are chess. HIMARS as far as you can see and Patriots/Iron Dome/CIWS. You won’t be able to get a fruit fly in.
And what if we deploy a carrier into the Black Sea.
Game over.
The DPRK is really not in a position to do this and Russia is one of its two most important allies by a very wide margin.