New game. Podkidnoi with hidden trump

I would like to know how many people are interested in adding a version with a hidden trump card to the podkidnois?

So what does this hidden trump game look like?

It works like a regular podkidnoi. But under the trump card (which is visible), one random card from the deck is placed upside down (so that no one can see what card it is). If the entire deck of cards is played, this card is revealed and becomes the new trump card at the end of the game. It is possible that the pot (for example) that you have been holding the whole time becomes useless if a square is revealed from below. But I repeat that it is revealed only when the entire deck of cards has been played and one of the players needs to take another card. Then you get it and show everyone what the new trump card is.

You can imagine a more absurd game. Then you could even make a variant of chess where in the endgame it turns out that some piece is actually a flag or something.

A pot with a trump exchange makes sense, because if there are four or more players, the deck of cards runs out relatively quickly and those who didn't get any trump at the beginning may even win at the end.

Why not, podkidnoi is a pointless game anyway!