The same way he responded to the previous advanced weapon systems being supplied. By saying that THIS TIME it is too much.

Then he will report destroying them before they get delivered...

His military is already, quite literally, decimated. Russia is collapsing from an infestation of horribly corrupt leadership. So really, who gives a fuck what putin might do. NATO will literally elimate the rest of the russian military if they escalate. Amd there won't be a damn thing outin or russia can do about it, besides maybe launching nukes if they are even still functional after years of no maintenance.

The same as every time? He utters threats of nukes. Does nothing. The war continues.

Russians will do more empty threats, report more allegedly destroyed western equipment and mobilize more men willing to die in the name of putin's yacht

The same way he has since the war began? He won’t attack a nato country or anything like that