Rulings
Q1: 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.
Q2: 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.
Q3: 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.
Q4: 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.
Q5: Can I use Blast Digivolve 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. Blast Digivolve is performed at the end of the counter timing. If you activate this card's Opponent's Turn effect, the attack will end before Counter effects trigger during the counter timing, therefore Blast Digivolve can no longer be performed.
Q6: 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.
Data Sources
Lv.4 Witchmon EX6-048 C Champion | Data | Wizard [On Play] [When Digivolving] By trashing 1 card in your hand, until the end of your opponent's turn, 1 of their Digimon gains "[End of Attack] Delete this Digimon". --- Inherited: [Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, by deleting 1 of your other Digimon, end the attack.
Lv.4 Witchmon EX6-048 C Champion | Data | Wizard [On Play] [When Digivolving] By trashing 1 card in your hand, until the end of your opponent's turn, 1 of their Digimon gains "[End of Attack] Delete this Digimon". --- Inherited: [Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, by deleting 1 of your other Digimon, end the attack.
Lv.4 Witchmon EX6-048 C Champion | Data | Wizard [On Play] [When Digivolving] By trashing 1 card in your hand, until the end of your opponent's turn, 1 of your opponent's Digimon gains "[End of Attack] Delete this Digimon." --- Inherited: [Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, by deleting 1 of your other Digimon, end the attack.
Lv.4 ウィッチモン EX6-048 C 成熟期 | データ種 | 魔人型 【登場時】【進化時】自分の手札を1枚破棄することで、相手のターン終了まで、相手のデジモン1体に「【アタック終了時】このデジモンを消滅させる。」の効果を与える。 --- Inherited: 【相手のターン】[ターンに1回]相手のデジモンがアタックしたとき、他の自分のデジモン1体を消滅させることで、そのアタックを終了する。