When I use this Digimon to attack an opponent's Digimon without digivolution cards, and this card's [Your Turn] effect deletes that Digimon, what happens to the attack?
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Official Ruling
Because your opponent's Digimon was the target of the battle and is no longer in play, a battle doesn't occur. However, the counter timing and end of attack timing still exist, therefore any applicable effects will trigger.