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

I used this card's <On Play> effect to return 1 card from my security stack to the hand, then I placed 1 yellow card with the [Vaccine] from my hand at the bottom of my security stack. At such times, is a card considered to be added to my security stack, allowing this card's <Your Turn> effect to activate?
Yes, it will activate.
Ruled Mar 28, 2024
When I use this card's <On Play> effect to return 1 card from my security stack to the hand, do I have to reveal the returned card to my opponent?
No, there are no requirements for the card you return to your hand with this effect, so you don't have to reveal it to your opponent.
Ruled Mar 28, 2024
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