REDU format ruling
Grave Lure

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
Card effect (current official text)Turn the top card of your opponent's Deck face-up, then your opponent shuffles their Deck. When your opponent draws the face-up card, immediately send it to the Graveyard.
Rulings
- If your Deck is already face-up because of "Convulsion of Nature", then the card from "Grave Lure" is turned face-down.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.