6 official rulings from Bandai, last ruled Sep 13, 2024. Straight answers to how this card actually resolves.

A Digimon affected by this card's <On Play> <When Digivolving> effect attacked the opponent player, then a <Security> effect gave this Digimon <De Digivolve 1> and trashed it. Does the <End Of Attack> effect activate in such cases?
Yes, it activates. Until the end of your opponent's turn, 1 of their Digimon gains that effect, so the <End Of Attack> effect will activate even if the affected Digimon digivolves or de-digivolves.
Ruled Jun 28, 2024
Can I use to digivolve my Digimon if I activate this card's inherited effect and end the attack from an opponent's Digimon?
No, you can't. is performed at the end of the counter timing. If you activate this card's <Opp Turn> effect, the attack will end before <Counter> effects trigger during the counter timing, therefore can no longer be performed.
Ruled Jun 28, 2024
Do <End Of Attack> effects activate if I activate this card's inherited effect and end the attack from an opponent's Digimon?
Yes, it activates.
Ruled Jun 28, 2024
When this card's inherited effect activates, is an attack considered to have never occurred?
No. The attack is considered to occur, therefore <When Attacking> effects and other processes are still performed.
Ruled Sep 13, 2024
When an opponent's Digimon attacks, can this card's inherited effect end the attack before <When Attacking> effects activate?
No, this effect triggers simultaneously with <When Attacking> effects. The turn player's effects will resolve first, then this effect will resolve, then the attack will end.
Ruled Sep 13, 2024
When an opponent's Digimon attacks, can I activate this card's inherited effect after comparing DP for the battle and end the attack at that timing?
No. After the battle is resolved, the timing for activation of effects has already passed, so the effect can't activate.
Ruled Sep 13, 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.