In that case, that deck is shuffled well. The last sentence, , begins with in that case, meaning if a player returned cards to their deck, and is followed with that deck, meaning the deck to which cards were returned. In other words, if one player returns cards to their deck and the other does not, only the player who does should shuffle their deck
It looks like hes interested in Rush Duel just like Yudias is, but whats his real goal
Strategic pricing maximizes ROI and attracts collectors
However, if a card with an [On Play] [When Digivolving] effect was given a "can't activate [When Digivolving] effects" effect, you can use this card's [End of Your Turn] effect to activate that effect as an [On Play] effect
Yes, you need to reveal all face-down creatures when they die or are exiled