Card Rulings:Cyber Dragon

• You can only use the effect of "Cyber Dragon" to Special Summon itself during your Main Phase.

• The effect of "Cyber Dragon" does not start a chain.

• You can negate the Special Summon of "Cyber Dragon" with "Royal Oppression", "Solemn Judgment", or "Horn of Heaven".

Mentions in Other Rulings

• Attack Reflector Unit: You can Tribute a face-down "Cyber Dragon" to activate "Attack Reflector Unit".

• Black Horn of Heaven: Like "Horn of Heaven", this card cannot be used against "Premature Burial", etc. It can be used against inherent Special Summon effects like "Cyber Dragon"...

• Chimeratech Overdragon: When you Fusion Summon this card you can use a substitute, such as "King of the Swamp", for the "Cyber Dragon", but not for the Machine-Type monsters. That means you can use a maximum of 1 substitute monster in the Fusion Summon.

• Generation Shift: If you target "Proto-Cyber Dragon" or "Elemental Hero Neo Bubbleman" with this effect, you must add "Proto-Cyber Dragon" or "Elemental Hero Neo Bubbleman" to your hand. You cannot add "Cyber Dragon"...

• Karma Cut: If "Proto-Cyber Dragon" is removed from play by "Karma Cut", only other "Proto-Cyber Dragon" cards will be removed from play. "Cyber Dragon" is not affected.

• Neo-Spacian Dark Panther: If you target "Proto-Cyber Dragon", "Neo-Spacian Dark Panther's" name will be treated as "Cyber Dragon" because of the copied effect.

• Next to be Lost: If you target "Proto-Cyber Dragon" on your side of the field for "Next to be Lost", you send a "Cyber Dragon" from your Deck to the Graveyard, not a "Proto-Cyber Dragon".

• Proto-Cyber Dragon: If "Skill Drain" is active, this card is no longer treated as "Cyber Dragon". You could not use it for "Attack Reflector Unit", etc.

• Proto-Cyber Dragon: You can have 3 "Cyber Dragon" and 3 "Proto-Cyber Dragon" in your Deck and Side Deck combined.

• Proto-Cyber Dragon: If you Special Summon this card you can activate "Inferno Reckless Summon" and Special Summon "Cyber Dragon" from your Deck.

• Proto-Cyber Dragon: While this card is face-up on the field, it can be used as "Cyber Dragon" for a Fusion Summon.

• Proto-Cyber Dragon: If "Proto-Cyber Dragon" is used in the Fusion Summon of "Cyber Twin Dragon", and "De-Fusion" is used on that "Cyber Twin Dragon", you cannot Special Summon the "Proto-Cyber Dragon" from the Graveyard because its name is not 1 of the listed Fusion-Material Monsters. (It's no longer treated as "Cyber Dragon" while in the Graveyard.)

OCG Rulings

• This card's effect would check when you choose to activate it, or, even if opponent would sacrifice his/her monster at your turn (and that's the only monster he/she has), this card can still be special summon.