Advanced format ruling
Zeradias, Herald of Heaven
Card effect (current official text)You can discard this card to the GY; add 1 "The Sanctuary in the Sky" from your Deck to your hand. If "The Sanctuary in the Sky" is not on the field, destroy this card.
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.