Grand Horn of Heaven

 This card has two counterparts: Horn of Heaven and Black Horn of Heaven.

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OCG Rulings

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This card can only be activated during your opponent's Main Phase.: Great Horn of Heaven

This card can be activated when a Special Summon that does not start a Chain Link is performed like a Synchro, Xyz and Pendulum Summon.

This card does not target.

The effect finishes resolving after the opponent's Main Phase ends. (The effect does not finish resolving when the monster is destroyed and the opponent draws 1 card.)

If "Great Horn of Heaven" is activated during your opponent's Main Phase 1, after their Main Phase ends, they must choose to either conduct their Battle Phase or proceed to the End Phase.

If "Great Horn of Heaven" is activated during your opponent's Main Phase 2, after their Main Phase ends, they proceed to the End Phase.

"Great Horn of Heaven" cannot be activated if you control "Protector of the Sanctuary".: Can "Great Horn of Heaven" be activated if you control "Protector of the Sanctuary"?

"Great Horn of Heaven" cannot be activated if the opponent has no cards in their Deck.: Can "Great Horn of Heaven" be activated if the opponent has no cards in their Deck?

If the activation of "Great Horn of Heaven" is negated, the effect is not applied. ("Negate the Special Summon, and if you do, destroy that monster(s), then your opponent draws 1 card, then end the Main Phase." is not applied.): If the activation of "Great Horn of Heaven" is negated, what happens?

"Great Horn of Heaven" can be activated when the opponent Pendulum Summons 2 or more monsters. In this case, all monsters that would be Pendulum Summoned are destroyed, but even if 2 or more monsters are destroyed, your opponent only draws 1 card.: If "Great Horn of Heaven" is activated when the opponent Pendulum Summons, how many cards do you draw?