Exile all cards from your hand face down. At the beginning of the next end step, return those cards to your hand, then draw a card.
If the delayed triggered ability is countered (for example, with Voidslime), the cards remain exiled forever.
If you cast this during the End step, you won’t return the cards to your hand or draw a card until the next turn’s End step.
No player may look at the cards while they’re face down.