Card Rulings:Wave-Motion Cannon

"Wave-Motion Cannon":

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TCG Rulings

Mentions in Other Rulings

• Damage Eater: You cannot Chain the effect of Damage Eater to the activation of Wave-Motion Cannon, but you CAN Chain it to the activation of the effect of Wave-Motion Cannon that inflicts damage.

• Lifeforce Harmonizer: This effect can only be chained to the activation of a card that is confirmed to inflict damage at resolution. It cannot be used against the activation of “Wave-Motion Cannon” or the activation of the effect of “Wave-Motion Cannon”. It cannot be used against “Thestalos the Firestorm Monarch” since you don’t know if damage will be inflicted.

OCG Rulings

• Sending this card from the field to the Graveyard during your Main Phase is a cost to activate the effect that inflicts damage.

• The effect of "Lifeforce Harmonizer" can only be chained to the activation of a card when that card would inflict damage. You cannot activate it when "Wave-Motion Cannon" is first activated, since it is not inflicting damage. You cannot activate it when "Wave-Motion Cannon" is sent to the Graveyard, since you are not activating a card. The same applies to other Continuous Spell/Trap Cards that inflict damage.

• The activation of a Spell Card, as mentioned in the text of "Magical Citadel of Endymion"/"Skilled White Magician"/etc, is when you play it face-up from your hand, or when the Spell Card is Set and you flip it face-up. It does not include activating the effect of a Spell card which is already face-up on the field, such as when you activate the effect of "Wave-Motion Cannon" or "Inspection". "Skilled Dark Magician" etc will not gain a Spell Counter when you activate the effect of "Wave-Motion Cannon" etc.

• "Barrel Behind the Door", "Trap of Board Eraser", and similar cards cannot be activated in Chain to the effect of a Continuous Spell or Trap Card that activates and will inflict damage, such as when a "Wave-Motion Cannon" or "Ominous Fortunetelling" which is already face-up has its effect activate.

• The current errata of "Cold Wave" is "This card can only be activated at the start of your Main Phase 1. Until your next Draw Phase, neither play can Set nor activate the effects of Spell and Trap Cards.". Thus, while the effect of "Cold Wave" is active, neither player can,
  • set Spell and Trap Cards from his hand.
  • activate Spell and Trap Cards from his hand.
  • activate Spell and Trap Cards which are Set in the Spell & Trap Card Zone.
  • activate the effect of Spell and Trap Cards which are already face-up on the field, such as the effect of "Wave-Motion Cannon"

Mentions in Other Rulings

• "Alector, Sovereign of Birds" only negates effects that activate on the field. It will not stop "Sangan", since its effect activates in the Graveyard. It will negate "Exiled Force", since his effect activates on the field.

Previously Official Rulings

• Sending "Wave-Motion Cannon" to the Graveyard is a cost, so when you send it to the Graveyard, it's too late for your opponent to chain "Mystical Space Typhoon", etc., to destroy "Wave-Motion Cannon", because "Wave-Motion Cannon" is already in the Graveyard.

• Your opponent cannot chain "Magic Jammer", or use "Dark Paladin", etc., when you send "Wave-Motion Cannon" from the field to the Graveyard. Your opponent CAN chain "Magic Jammer" or use "Dark Paladin", etc., when you first activate "Wave-Motion Cannon" (meaning when you place it face-up on the field).

• If "Imperial Order" is active on the field, count Standby Phases as normal for "Wave-Motion Cannon".

• You can activate "Wave-Motion Cannon" (place it face-up on the field) and send it to the Graveyard during the same turn, but it will not do any damage.

• If the Standby Phase is skipped with "Solomon's Lawbook" or the turn is skipped with "Gamble", increase the count for "Wave-Motion Cannon" anyway.

• You cannot use "Pyro Clock of Destiny" with "Wave-Motion Cannon".

Mentions in Other Rulings

• Barrel Behind the Door: You cannot activate "Barrel Behind the Door" against a Continuous Spell Card... So you cannot activate it against..."Wave-Motion Cannon"...

• Sonic Jammer: While "Sonic Jammer's" effect is applied, your opponent can still use the effects of "Wave-Motion Cannon"...when sent to the Graveyard...

• Spell Counters: When you use the effect of a Continuous Spell Card that is already face-up on the field, such as...sending "Wave-Motion Cannon" to the Graveyard...you do NOT place a Spell Counter on this monster.