While you have no face-up security cards, you may ignore this card's color requirements.
[Security] [All Turns] While you have 1 or more memory, none of your [DS] trait Digimon can be deleted in battle.
[Main] Add your bottom security card to the hand. Then, place this card face up as the bottom security card.
Security Effect
[Security] You may play 1 level 5 or lower Digimon card with the [DS] trait from your hand without paying the cost.
Rulings Q&A — 8 entries
Q1Q3954
Is the "while you have no face-up security cards" condition met when I have 0 cards in my security stack?
What happens to cards placed face up in the security stack by effects?
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Official Ruling
They become face-up security cards that remain revealed. Other than rules that specify face-up security cards, the rules apply in the same manner as standard security cards.
What happens upon a security check for a security card that is placed face-up?
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Official Ruling
The check is performed with the card left revealed. Other than rules for cards left revealed, the rules apply in the same manner as standard security checks.
I have this card placed face-up in my security stack. An opponent's Digimon digivolved, and I now have 1 or more memory. If my opponent's digivolved Digimon activates an effect and my Digimon with the [DS] trait attacks at such times, can this card's [All Turns] effect prevent my Digimon from being deleted in that battle?
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Official Ruling
Yes, it is not deleted. This card's [All Turns] effect will activate as soon as you have 1 or more memory, therefore none of your Digimon with the [DS] trait will be deleted in battle.