Goat format ruling
Needle Worm
Card effect (current official text)FLIP: Send the top 5 cards of your opponent's Deck to the Graveyard.
Rulings
- If there are fewer than 5 cards in your opponent’s Deck when this card’s Flip Effect is activated, all remaining cards in the Deck are placed in the GY. The opponent does not lose immediately, but will lose if unable to draw a card when required (such as during their next DP).
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.