I used this card's [On Play] [When Digivolving] [When Attacking] effect to delete an opponent's Digimon with an [On Deletion] effect, and I used the part of the effect after "then" to return that card from their trash to the bottom of the deck. Can that deleted card's [On Deletion] effect activate at such times?
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Official Ruling
No, it can't be activated. When a card with an effect that's pending activation leaves its current area while activation is pending, the effect can no longer be activated. In this case, the deleted card's [On Deletion] effect triggers, but it's removed from the trash before the effect can activate.