Can the ＜Security＞ effect of the card added to the hand with this card's "your opponent adds the top card of their security stack to their hand" effect be activated?

No, since the card was not revealed by a security check, its ＜Security＞ effect can't be activated.

MirageGaogamon rulings (BT11-033)

1 official ruling from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

Effect: [When Digivolving] Return 1 of your opponent's level 5 or lower Digimon to its owner's hand. If no Digimon was returned by this effect, your opponent adds the top card of their security stack to their hand. [All Turns] [Once Per Turn] When an effect adds cards to your opponent's hand, gain 1 memory for every 4 cards in your opponent's hand.

Official Q&A

Can the ＜Security＞ effect of the card added to the hand with this card's "your opponent adds the top card of their security stack to their hand" effect be activated?
No, since the card was not revealed by a security check, its ＜Security＞ effect can't be activated.
Ruled Mar 28, 2024

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Questions and answers are Bandai's official rulings, collected and translated by the DigimonCardGame Wiki community and reused here under CC BY-SA. Card names and card text are © their respective publishers; Combalo is not affiliated with Bandai.

MirageGaogamon rulings (BT11-033)

1 official ruling from Bandai, last ruled Mar 28, 2024. Straight answers to how this card actually resolves.

Effect: [When Digivolving] Return 1 of your opponent's level 5 or lower Digimon to its owner's hand. If no Digimon was returned by this effect, your opponent adds the top card of their security stack to their hand. [All Turns] [Once Per Turn] When an effect adds cards to your opponent's hand, gain 1 memory for every 4 cards in your opponent's hand.

Official Q&A

Can the ＜Security＞ effect of the card added to the hand with this card's "your opponent adds the top card of their security stack to their hand" effect be activated?
No, since the card was not revealed by a security check, its ＜Security＞ effect can't be activated.
Ruled Mar 28, 2024

Got a line that uses MirageGaogamon? Map it in the builder and share it with a link.