Advanced format ruling
Patroid

Card effect (current official text)Once per turn, during your Main Phase, you can look at 1 face-down card your opponent controls, then return it to its original position.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.