REDU format ruling
Senri Eye

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)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
- 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.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.