I use this card on one of my Digimon, which I use to attack an opponent's Digimon. Does this count as the Digimon being blocked? Do I gain 3 memory?

No, your opponent has to use ＜Blocker＞ to block the attack in order for you to gain 3 memory.

I activate this card's ＜Security＞ effect. I move a Digimon from my breeding area to the battle area, then play a Digimon from my hand. Do these Digimon get ＜Security Attack +1＞ from this card's effect?

Yes. The effect applies to all of your Digimon, including those that enter the battle area after the start of your turn.

Atomic Inferno rulings (BT4-098)

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

Effect: [Main] 1 of your Digimon with the [Hybrid] trait gets +3000 DP, Security A. +1 and "[Your Turn] When this Digimon is blocked, gain +3 memory." for the turn.
Security effect: [Security] All of your Digimon gain Security A. +1 until the end of your next turn.

Official Q&A

I use this card on one of my Digimon, which I use to attack an opponent's Digimon. Does this count as the Digimon being blocked? Do I gain 3 memory?
No, your opponent has to use ＜Blocker＞ to block the attack in order for you to gain 3 memory.
Ruled Mar 28, 2024
I activate this card's ＜Security＞ effect. I move a Digimon from my breeding area to the battle area, then play a Digimon from my hand. Do these Digimon get ＜Security Attack +1＞ from this card's effect?
Yes. The effect applies to all of your Digimon, including those that enter the battle area after the start of your turn.
Ruled Mar 28, 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.

Atomic Inferno rulings (BT4-098)

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

Effect: [Main] 1 of your Digimon with the [Hybrid] trait gets +3000 DP, Security A. +1 and "[Your Turn] When this Digimon is blocked, gain +3 memory." for the turn.
Security effect: [Security] All of your Digimon gain Security A. +1 until the end of your next turn.

Official Q&A

I use this card on one of my Digimon, which I use to attack an opponent's Digimon. Does this count as the Digimon being blocked? Do I gain 3 memory?
No, your opponent has to use ＜Blocker＞ to block the attack in order for you to gain 3 memory.
Ruled Mar 28, 2024
I activate this card's ＜Security＞ effect. I move a Digimon from my breeding area to the battle area, then play a Digimon from my hand. Do these Digimon get ＜Security Attack +1＞ from this card's effect?
Yes. The effect applies to all of your Digimon, including those that enter the battle area after the start of your turn.
Ruled Mar 28, 2024

Got a line that uses Atomic Inferno? Map it in the builder and share it with a link.