While you have no face-up security cards, you can ignore this card's color requirements.
[Security] [All Turns] All of your blue or yellow [TS] trait Digimon gain <Blocker>. While you have [Neptunemon] or [Venusmon], all of your blue or yellow [TS] trait Digimon gain <Alliance>.
[Main] Add your bottom security card to the hand and place this card face up as the bottom security card. Then, you may play 1 blue or yellow [TS] trait Digimon card from your hand with the play cost reduced by 3.
Security Effect
[Security] You may play 1 level 4 or lower blue or yellow [TS] trait Digimon card from your hand or trash without paying the cost.
Rulings Q&A — 1 entries
Q1Q5681
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.