Quantumon
- Card Number
- LM-020
- Rarity
- SEC
- Category
- Digimon
- Level
- 6
- Block Icon
- 03
- Supplemental Rarity
- Alternative Art #1
- Colour
- Yellow Green
- Play Cost
- 13
- DP
- 13000
- Form
- Mega
- Attribute
- Data
- Type
- Fairy
- Digivolution Requirements
- Digivolve Cost
- 5
- Colour
- Yellow Green
- Level
- 5
- Category
- Digimon
- Effect
When Digivolving By placing 1 Digimon as the top security card, reveal all of your opponent's security cards, and place 1 card among them on top of the deck. Shuffle the rest and return them to the security stack.
Start of Opponent's Turn Declare 1 card category. Then, reveal the top card of your opponent's deck. If it's of that category, this Digimon isn't affected by that category's effects, other than this Digimon's effects, for the turn. Return the revealed cards to the top or bottom of your opponent's deck.
- Errata
- Date
- Correction
[Start of Opponent's Turn] Declare 1 card category. Then, reveal the top card of your opponent's deck. If
that card is of the declaredit's of that category, this Digimon isn't affected by theat category's effects, of that card categoryther than this Digimon's effects, for the turn. Return the revealed cards to the top orthebottom of your opponent's deck.
- Q&A
- Date
- Question
What does "declare 1 card category" in this card's [Start of Opponent's Turn] effect mean, exactly?
- Answer
It refers to the four card categories: Digi-Egg cards, Digimon cards, Tamer cards, and Option cards.
You declare 1 of these categories at the start of your opponent's turn for this card's effect, your opponent reveals the top card of their deck, and if the revealed card is in the declared category, this Digimon will be unaffected by effects from cards in the declared card category.
- Date
- Question
Can I declare Digi-Egg cards for this card's [Start of Opponent's Turn] effect?
- Answer
Yes, you can.
However, Digi-Egg cards aren't used in decks, therefore revealed cards won't be in that category if you declare it.
- Date
- Question
I declared Tamer cards for this card's [Start of Opponent's Turn] effect, and a Tamer card was revealed from the deck.
In such cases, is this Digimon unaffected by inherited effects on Tamer cards in digivolution cards of my opponent's Digimon?
- Answer
No, it's affected by such effects.
Inherited effects on Tamer cards in digivolution cards of Digimon are treated as Digimon effects.
- Date
- Question
I used this card's [Start of Opponent's Turn] effect to prevent Digimon effects from affecting this card.
At such times, does this card still gain the inherited effects on Digimon cards in its digivolution cards?Apr. 25, 2025 Updated
- Answer
Yes, it gains inherited effects.
- Date
- Question
I declared Digimon cards for this card's [Start of Opponent's Turn] effect. If a Digimon card is revealed from the deck, is this Digimon unaffected by [Security] effects activated by Security Digimon?
- Answer
Yes, it isn't affected.
[Security] effects on Security Digimon are treated as Digimon effects, so the "this Digimon isn't affected by the effects of your opponent's Digimon" effect prevents such effects from affecting this Digimon.
- Date
- Question
Can I use this card's [When Digivolving] effect to return my [EX2-007 Mother D-Reaper] from the battle area to the security stack, reveal all cards in my opponent's security stack, and place 1 card among them at the top of my opponent's deck?
- Answer
Yes, you can.
If your [EX2-007 Mother D-Reaper] is chosen as the target to place in the security stack, it will ultimately be placed at the bottom of the Digi-Egg deck instead of the security stack according to the rules, but it meets this card's "by placing 1 Digimon on top of its owner's security stack" condition. A card isn't actually added to the security stack, therefore effects such as "when a card is added to the security stack" don't trigger.
- Date
- Question
Can I use this card's [When Digivolving] effect to return my token played as a Digimon from the battle area to the hand, reveal all cards in my opponent's security stack, and place 1 card among them at the top of my opponent's deck?
- Answer
Yes, you can.
If your token is chosen as the target to place in the security stack, it will ultimately be removed from the game instead of being placed in the security stack according to the rules, but it meets this card's "by placing 1 Digimon on top of its owner's security stack" condition. A card isn't actually added to the security stack, therefore effects such as "when a card is added to the security stack" don't trigger.
- Date
- Question
If I choose my [EX2-007 Mother D-Reaper] or token that is treated as a Digimon in the battle area as the target for this card's [When Digivolving] effect, it isn't placed in the security stack. In such cases, do "when a card is removed from the security stack" effects trigger because a card wasn't added to the security stack even though it normally should have been added?
- Answer
No, it doesn't trigger.
- Releases

- Genre
- Others
- Release Name
- SPECIAL LIMITED SET
- Official Product Page
- Date
- Notes
- Special Limited Set






