Advanced format ruling
Miracle Kids
Card effect (current official text)Target 1 monster your opponent controls; that target loses 400 ATK for each "Hero Kid" in your Graveyard, until the End Phase.
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.