What happens if this card's ＜When Digivolving＞ effect activates twice and 2 of my opponent's Digimon gain the "＜Start Your Main＞ This Digimon attacks" effect?

The effects trigger at the same time at the start of your opponent's main phase, and an attack is only performed for the effect that activated first. Specifically, after activation has ended for an effect such as the ＜When Attacking＞ effect on the Digimon whose effect activated first, and before the counter timing occurs, the effect would activate for the 2nd Digimon that was pending activation, but since the 1st Digimon is already attacking, the effect ends without an attack made. As a result, only the Digimon whose effect was activated first can attack.

Etemon rulings (EX5-048)

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

Effect: [On Play] [When Digivolving] Until the end of your opponent's turn, 1 of your opponent's Digimon gets -3000 DP and gains "[Start of Your Main Phase] This Digimon attacks."
Inherited effect: [Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, you may reveal the top 3 cards of your deck. You may play 1 black or yellow Digimon card with a play cost of 3 or less among them without paying the cost. Trash the rest.

Official Q&A

What happens if this card's ＜When Digivolving＞ effect activates twice and 2 of my opponent's Digimon gain the "＜Start Your Main＞ This Digimon attacks" effect?
The effects trigger at the same time at the start of your opponent's main phase, and an attack is only performed for the effect that activated first. Specifically, after activation has ended for an effect such as the ＜When Attacking＞ effect on the Digimon whose effect activated first, and before the counter timing occurs, the effect would activate for the 2nd Digimon that was pending activation, but since the 1st Digimon is already attacking, the effect ends without an attack made. As a result, only the Digimon whose effect was activated first can attack.
Ruled Mar 28, 2024

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Etemon rulings (EX5-048)

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

Effect: [On Play] [When Digivolving] Until the end of your opponent's turn, 1 of your opponent's Digimon gets -3000 DP and gains "[Start of Your Main Phase] This Digimon attacks."
Inherited effect: [Opponent's Turn] [Once Per Turn] When an opponent's Digimon attacks, you may reveal the top 3 cards of your deck. You may play 1 black or yellow Digimon card with a play cost of 3 or less among them without paying the cost. Trash the rest.

Official Q&A

What happens if this card's ＜When Digivolving＞ effect activates twice and 2 of my opponent's Digimon gain the "＜Start Your Main＞ This Digimon attacks" effect?
The effects trigger at the same time at the start of your opponent's main phase, and an attack is only performed for the effect that activated first. Specifically, after activation has ended for an effect such as the ＜When Attacking＞ effect on the Digimon whose effect activated first, and before the counter timing occurs, the effect would activate for the 2nd Digimon that was pending activation, but since the 1st Digimon is already attacking, the effect ends without an attack made. As a result, only the Digimon whose effect was activated first can attack.
Ruled Mar 28, 2024

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