Tengu format ruling
Royal Firestorm Guards
Card effect (current official text)If this card is Normal Summoned: Target 4 Pyro-Type monsters in your Graveyard; shuffle all 4 into the Deck, then draw 2 cards.
Rulings
- If one target is not shuffled, the other 3 are also not, and no cards are drawn.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Tengu forum — sourced change requests get reviewed.