Advanced format ruling
Chaos Emperor Dragon - Envoy of the End
Card effect (current official text)Cannot be Normal Summoned/Set. Must be Special Summoned (from your hand) by banishing 1 LIGHT and 1 DARK monster from your GY. Once per turn: You can pay 1000 LP; send as many cards in both players' hands and on the field as possible to the GY, then inflict 300 damage to your opponent for each card sent to the opponent's GY by this effect. You cannot activate other cards or effects during the turn you activate this card's effect.
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.