ALIN-EN046 – Number 69: Heraldry Crest – Dark Matter Demolition – Quarter Century Secret Rare – 1st Edition

5 Level 4 monsters
Cannot be destroyed by battle or card effects. Once per turn (Quick Effect): You can detach 1 material from this card, then target 1 face-up monster your opponent controls; that monster’s name becomes ‘Unknown’. Negate any ‘Unknown’ effects activated by your opponent.