"Cyber Dragon" + "Cyber Dragon" + "Cyber Dragon"
A Fusion Summon of this card can only be done with the above Fusion Material Monsters. If this card attacks a Defense Position monster, inflict piercing battle damage to your opponent.
Lots of monsters are able to copy Cyber Dragon’s name, so this eases Cyber End Dragon’s summoning even without using fusion substitutes.
You can use Machine Duplication on a Cyber Dragon Core to get all three copies on the field and use them as fusion materials to make Cyber End Dragon.
You can tribute The Light - Hex-Sealed Fusion with 2 Cyber Dragons to Special Summon Cyber End Dragon bypassing its restriction.