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

Does this card’s <When Digivolving> effect force me to trash the top card of my security stack?
No, this card’s <When Digivolving> effect reads “you may,” so you can choose whether or not to trash the top card of your security stack.
Ruled Mar 28, 2024
Can I activate this card’s <When Digivolving> effect when my security stack is empty?
No. You must trash a card from your security stack in order to activate it.
Ruled Mar 28, 2024
I use this card’s <When Digivolving> effect to trash a card from my security stack. If there are 3 or fewer cards left in my security stack, does this card’s <All Turns> effect trigger?
Yes, it does.
Ruled Mar 28, 2024
I have 2 or more copies of this Digimon in play. My opponent attacks with a Digimon, removing a card from my security stack. Do all of the effects on copies of this Digimon activate simultaneously, activating for each one?
Fundamentally, this is possible. However, the effects don’t activate simultaneously, but one at a time in order. Once results in you having 4 cards in your security stack, any remaining copies of the effect don't activate. Any [BT6-044]/[Dynasmon] whose effects don’t activate can still be activated later in the turn.
Ruled Mar 28, 2024
An opponent’s Digimon performs a security check, flipping over a card with a <Security> effect. Which activates first: This card’s <All Turns> effect, or the <Security> effect?
The <Security> effect activates first. After the <Security> effect and any effects triggered by its activation have finished activating, this card’s <All Turns> effect activates.
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.