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

Does this card's <All Turns> effect prevent deletion even when I lose a battle with my opponent's Security Digimon?
Yes, it prevents that deletion.
Ruled Mar 28, 2024
Does this card's <All Turns> delete this Digimon when my opponent's Digimon activates <Retaliation> after battling this Digimon?
Yes, it's deleted. <Retaliation> is deletion by an effect, not by battle.
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.