Advanced format ruling
Mind Over Matter
Card effect (current official text)When a monster would be Normal or Special Summoned, OR a Spell/Trap Card is activated: Tribute 1 Psychic-Type monster; negate the Summon or activation, and if you do, destroy that card.
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.