My friends and I just played a quick game and we wondered if you use Valeria's Shop ability do you have to wait until the end of your upcomming turn before you move your assests and foundations to your staging area instead at the end of your opponents turn.

Anything you play "as a form" fully resolved at the end of the turn. Foundations and Assets go down to your staging area/attacks go to your momentum (if they did damage) etc etc.

Sorry I need a clearer point of clarification since the issue came up again. If play Val Shop on my opponents turn and play a foundation I do not wait until the end of my turn to pull the foundations down i pull down the foundations during my oppoenents end phase.

at the end of ANY turn, EACH player clears their card pool.

Any foundations or assets played as forms are moved to the staging area. Attacks that dealt dmg may be placed in momentum. Otherwise cards are discarded.

So in short, yes.

Clearing foundations to your staging area is the same process that clears blocks, Reversals, or anything else you played during your opponent's turn during the End Phase.