Advanced format ruling
Cyber End Dragon
Card effect (current official text)"Cyber Dragon" + "Cyber Dragon" + "Cyber Dragon"
A Fusion Summon of this card can only be done with the above Fusion Materials. If this card attacks a Defense Position monster, inflict piercing battle damage.
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.