REDU format ruling
Cyber End Dragon

Nearest-era rulings (Tengu, Sept 2011) — no REDU-specific archive exists.
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.
Rulings
- You can Special Summon "Cyber End Dragon" with "Cyber-Stein" or "Metamorphosis".
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the REDU forum — sourced change requests get reviewed.