Goat Format · April 2005
What the Goat Format rulings add to, or change from, the rulings above.
A card declared by "Prohibition" may not be Normal Set, Normal Summoned, or activated.
A card declared by "Prohibition" may be Special Summoned, but will have no effect and may not attack.
Monster cards chosen by the effect of "Prohibition" may not be Set.
"Prohibition" will not prevent an instant win through the effect of "Exodia the Forbidden One."
If a "Prohibition" that declares "Jinzo" is negated by "Imperial Order", "Jinzo" may be Summoned.
If "Sinister Serpent" is declared for "Prohibition", a "Sinister Serpent" not already in the Graveyard at the declaration may not be retrieved from the Graveyard as long as "Prohibition" is active.
A Spell or Trap card declared by "Prohibition" may not be placed on the field by the effect of "Magical Hats".
Q: If "Prohibition" has been activated and "Spirit Message 'L'" is selected, will that prevent "Destiny Board" from completing the message? A: "Prohibition" would not stop the "Spirit Message 'L'" from being placed onto the field by the effect of "Destiny Board." Curtis Schultz, 04/07/2004
Q: Does "Prohibition" only affect the field? ("Kuriboh"/"Thunder Dragon" never reach the field) A: "Prohibition" prevents the named card from being played. Activating the effect of "Thunder Dragon" or "Kuriboh" would be playing it. Curtis Schultz, 04/21/2004
Q: If my opponent already has Set the card declared with "Prohibition," can he activate the card? A: Yes they can. Prohibited cards that were Set on the field before "Prohibition" resolved can still be activated. Curtis Schultz, 04/22/2004
Q: If my opponent plays "Monster Reborn" on the card declared with "Prohibition," that is not considered "playing it" right? A: Right, but if the Monster Card is an Effect Monster Card, it will have no effect AND the monster would not be able to attack [or change its battle position]. Curtis Schultz, 04/22/2004
Edison Format · March 2010
What the Edison Format rulings add to, or change from, the rulings above.
"Used" means that those cards can’t:
Be activated/Set. Be Summoned/Set from hand. Activate/apply its effects.
Be used as Material. Change its position or Attack.
A declared Monster can be Summoned from the Deck/GY/Banished, but if it is, its effects can’t be activated or applied, and it cannot change its Battle Position nor Manually Attack.
If "Lord of D." is declared with "Prohibition", if it is Special Summoned it 'cannot be used', but "The Flute of Summoning Dragon" can be activated.
'Cannot be used' means that the declared card cannot be placed onto the field from your hand. A declared Monster Card cannot be Summoned or Set from your hand, and any effect it activates while in your hand cannot be activated. A declared Spell or Trap Card cannot be activated or Set from your hand. Every player in the Duel cannot 'use' the declared card.
The declared card may be used to pay costs. The declared card can be discarded, Tributed, or sent to the GY.
"Prohibition" does not target the declared card.
A declared Monster Card can be Special Summoned from the Deck, GY, or Removed Zone. If this happens, the Monster Card's effects are not applied, and it cannot attack or change its battle position manually. Any maintenance costs must still be paid.
Declared cards on the field before "Prohibition" resolves are unaffected. Declared Monster Cards Set before "Prohibition" resolves can be Flip Summoned. Declared Spell or Trap Cards Set before "Prohibition" resolves can be activated.
After declaring a card for "Prohibition", the declared card cannot be changed.
If a Spell or Trap Card is declared with "Prohibition", it cannot be Set with the effect of "Dust Tornado".
If a declared Monster Card is Special Summoned face-down (by "Cyber Jar", etc.), when it is flipped face-up its effects are not applied. If it has a Flip Effect, the Flip Effect does not activate.
The Ignition-like effects of a declared Continuous Spell or Trap Card face-up on the field before "Prohibition" resolves can still be activated.
If a Monster Card declared by "Prohibition" is Special Summoned, it cannot be used as a Synchro Material Monster for a Synchro Summon.
If a Monster Card declared by "Prohibition" is Special Summoned face-down and afterwards "Prohibition" is negated, the declared Monster Card can be Flip Summoned and its effects will be applied.
If "Mystic Tomato" is declared with "Prohibition" while a "Mystic Tomato" is on the field, when the "Mystic Tomato" is destroyed by battle and sent to the GY its effect activates. If it Special Summons another "Mystic Tomato", the Special Summoned "Mystic Tomato" 'cannot be used', so its effects will not be applied and its battle position cannot be changed.
If "Exodia the Forbidden One" is declared with "Prohibition", when a player has all five pieces of Exodia in their hand, they win the Duel. This is a win condition and cannot be prevented with "Prohibition".
If "Sinister Serpent" is declared, a "Sinister Serpent" in the GY cannot be returned to its owner's hand. If the "Sinister Serpent" was on the field before "Prohibition" resolved, it can be returned to its owner's hand but 'cannot be used' after returning to its owner's hand.
If "Prohibition" is active and another "Prohibition" is activated, declaring "Prohibition", the copies of "Prohibition" on the field are unaffected, but other "Prohibition" cannot be activated or Set.
If "Prohibition" declares "Sangan" or "Witch of the Black Forest", if the declared card is on the field when "Prohibition" resolves, its effect will activate when it is sent to the GY. If the declared card is Special Summoned after "Prohibition" resolves, it 'cannot be used', so its effect will not activate when it is sent to the GY.
If "Nimble Momonga" or "Giant Germ" is on the field when declared by "Prohibition", when it is destroyed by battle and sent to the GY its effect activates, but the Special Summoned "Nimble Momonga" or "Giant Germ" 'cannot be used', so their effects will not be applied when they are destroyed by battle and sent to the GY.
A Level 4 or lower Monster Card declared by "Prohibition" can be Special Summoned by "Cyber Jar", but it 'cannot be used' so its effects are not applied and it cannot attack or change its battle position manually.
If "Jinzo" is declared by "Prohibition", the effect of a "Jinzo" that is already on the field is still applied. If a "Jinzo" is Special Summoned, it 'cannot be used', so the effects of Trap Cards are not negated and Trap Cards can be activated.
After your "Parasite Paracide" is shuffled into your opponent's Deck by its effect, if "Prohibition" is activated and declares "Parasite Paracide", when your opponent draws "Parasite Paracide" its effect is applied because its Flip Effect had already resolved.
If the effect of "Prohibition" is being negated, the declared card can be 'used'. If the declared card is on the field when the effect of "Prohibition" becomes active again the declared card on the field is unaffected.
If a Fusion Substitute Monster like "King of the Swamp" is declared by "Prohibition", it cannot be used as a Fusion Material substitute in a Fusion Summon while it is in your hand.
If "Thunder Dragon", "Honest", or "Kuriboh" is declared with "Prohibition", it can be discarded with "Card Destruction" but it cannot be discarded to activate its effect.
"Valkyrion the Magna Warrior", "The Fiend Megacyber", or "Gate Guardian" declared by "Prohibition" cannot be Special Summoned from your hand.
If a Fusion Monster is declared with "Prohibition", it cannot be Fusion Summoned from the Extra Deck with "Polymerization". If a Fusion Material Monster is declared, it cannot be used in a Fusion Summon.
If a Ritual Monster is declared with "Prohibition", it cannot be Ritual Summoned.
"Cyber Harpie Lady" cannot be declared with "Prohibition", because its name is treated as "Harpie Lady". "A Legendary Ocean" cannot be declared with "Prohibition", because its name is treated as "Umi".
If "Prohibition" declares "Jinzo" and afterwards it is negated by "Imperial Order", if "Jinzo" is Summoned it will negate "Imperial Order", but its effects will still be applied because it is already on the field when "Prohibition" is reapplied.
If "Metalzoa" or "Red-Eyes Black Metal Dragon" is declared with "Prohibition", they cannot be Special Summoned from the Deck.
If a "Spirit Message" card is declared with "Prohibition", it can still be placed onto the field by the effect of "Destiny Board".
If "The Mask of Remnants" is declared with "Prohibition", when "Masked Beast Des Gardius" is sent to the GY and its effect activates, "The Mask of Remnants" will be equipped from the Deck onto the opponent's monster.
If "Neko Mane King" is declared with "Prohibition", when "Neko Mane King" is sent from the hand to the GY by the opponent's effect, its effect does not activate. If "Neko Mane King" was already on the field before "Prohibition" resolved, its effect will activate.