Advanced format ruling
Convulsion of Nature
Card effect (current official text)As long as this card remains face-up on the field, both players must turn their respective Decks upside down and proceed with the current Duel.
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.