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

In a state where my opponent had no Digimon, I used this Digimon with <Security Attack +1> to attack, [BT3-036]/[Ankylomon] was flipped over for the 1st security check, and the <Security> effect played it as an opponent's Digimon at the end of the battle. When the 2nd security check is performed, can this card's <Your Turn> effect delete my opponent’s [BT3-036]/[Ankylomon]?
No, it can't. This card's <Your Turn> effect triggers "when a card is removed from your opponent's security stack," therefore it will trigger/activate when the 1st security check is performed, even if there are no targets. Because it's a <Once> effect, it can't trigger when the 2nd security check is performed.
Ruled Mar 28, 2024
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