原文While resolving Polygraph Orb’s last ability, your opponent chooses a card to be discarded without revealing it, chooses a creature to be sacrificed, or chooses to do neither. Then that player discards that card, sacrifices that creature, or loses 3 life. Your opponent can always choose to lose 3 life, even if they have cards to discard or creatures to sacrifice.
原文In a multiplayer game, each opponent in turn order makes their choice once, then all of the actions occur simultaneously. Opponents will know choices made by earlier opponents when making their choices, although a card chosen to be discarded this way isn’t revealed until it’s discarded.
原文Once you’ve announced that you’re casting a spell, players can’t take actions until you’ve finished doing so. Notably, opponents can’t try to remove cards from your graveyard to stop you from collecting evidence.