Advanced format ruling
Cybernetic Hidden Technology
Card effect (current official text)When an opponent's monster declares an attack: You can send to the Graveyard 1 "Cyber Dragon" you control, or 1 Fusion Monster you control that lists "Cyber Dragon" as a Fusion Material Monster, then target the attacking monster; destroy that target.
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.