Tower of Power stash after a nope

What happens to the Tower of Power stash after someone nopes the card?

Do the cards ged discarded? Or is that cheating because you get to know what cards are not in the draw pile

Do the cards get shuffled into the draw pile?

Or do they just stay there?

Can you steal from the stash without the cards protecting any player?

Can you then use the Godcat card as the Tower of Power card to keep the stash in play?

Theres just so many possibilities and the rules never specify anything…