Advanced format ruling
A Cat of Ill Omen
Card effect (current official text)FLIP: Choose 1 Trap from your Deck and place it on top of your Deck, or, if "Necrovalley" is on the field, you can add that Trap to your hand instead.
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.