Goat format ruling
Mind Crush

Card effect (current official text)Declare 1 card name; if that card is in your opponent's hand, they must discard all copies of it, otherwise you discard 1 random card.
Rulings
- You cannot activate Mind Crush if you have no hand. Both players must have at least 1 card in hand in order to activate Mind Crush.
- You declare the card name when you activate Mind Crush.
- If the opponent doesn’t have the named card, you can check their hand to confirm.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Goat forum — sourced change requests get reviewed.