Once per turn, during each of your Standby Phases, you can pay 100 Life Points to look at 1 card on the top of your opponent's Deck and return it to its original position. Your opponent cannot look at the card.
Rulings
Individual Card FAQs
You cannot use "Senri Eye"'s effect more than once during the same Standby Phase.
You can use the effect of "Senri Eye" if the top card on the Deck is face-up (due to "Convulsion of Nature" or "Parasite Paracide"), and in that case you don't hide the card from your opponent.
Spell|
Continuous