Advanced format ruling
Archlord Kristya
Card effect (current official text)If you have exactly 4 Fairy monsters in your GY, you can Special Summon this card (from your hand). If Summoned this way: Target 1 Fairy monster in your GY; add that target to your hand. Neither player can Special Summon monsters. If this face-up card would be sent from the field to the GY, place it on top of the Deck, 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.