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BT21-060 Destromon
Destromon
BT21-060
U
05
Lv. 5
Play: 10
5
6 from [Vemmon]
10000 DP
When Digivolving Until your opponent's turn ends, their effects can't trash this Digimon's stacked cards. Then, to 1 of your opponent's Digimon, De-Digivolve 1 for every 2 Vemmon in this Digimon's digivolution cards.
All Turns When this Digimon would leave the battle area, you may play 1 Vemmon from its digivolution cards without paying the cost.
Opponent's Turn {{OncePerTurn}} When one of your opponent's Digimon attacks, by returning 2 Vemmon from this Digimon's digivolution cards to the bottom of the deck, end that attack.Inherited
Inherited
Black Digimon
Unknown
Unknown
LIBERATOR

Q1: What does a "can't trash stacked cards" effect do, exactly?

This effect prevents cards stacked on top from being trashed by De-Digivolve or other effects, and cards stacked on the bottom can't be trashed by effects such as those that trash digivolution cards.

Q2: Can I return just 1 Vemmon to the bottom of the deck for the conditions of this card's inherited effect?

No, you can't. A "by doing X" condition can't be met if only some of the required actions are performed. The conditions for this inherited effect require you to return the specified number of cards to the bottom of the deck.

EN
Official English Card Listworld.digimoncard.com
Lv.5 Destromon      BT21-060  U
Ultimate | Unknown | Unknown/LIBERATOR

[Digivolve] [Vemmon]: Cost 6

[When Digivolving] Until your opponent's turn ends, their effects can't trash this Digimon's stacked cards. Then, to 1 of your opponent's Digimon, <De-Digivolve 1> for every 2 [Vemmon] in this Digimon's digivolution cards.
[All Turns] When this Digimon would leave the battle area, you may play 1 [Vemmon] from its digivolution cards without paying the cost.

---
Inherited: [Opponent's Turn] [Once Per Turn] When one of your opponent's Digimon attacks, by returning 2 [Vemmon] from this Digimon's digivolution cards to the bottom of the deck, end that attack.
A
Official English (Asia) Card Listen.digimoncard.com
Lv.5 Destromon      BT21-060  U
Ultimate | Unknown | Unknown/LIBERATOR

[Digivolve] [Vemmon]: Cost 6

[When Digivolving] Until your opponent's turn ends, their effects can't trash this Digimon's stacked cards. Then, to 1 of your opponent's Digimon, <De-Digivolve 1> for every 2 [Vemmon] in this Digimon's digivolution cards.
[All Turns] When this Digimon would leave the battle area, you may play 1 [Vemmon] from its digivolution cards without paying the cost.

---
Inherited: [Opponent's Turn] [Once Per Turn] When one of your opponent's Digimon attacks, by returning 2 [Vemmon] from this Digimon's digivolution cards to the bottom of the deck, end that attack.
W
DCG Wikidigimoncardgame.fandom.com
Lv.5 Destromon      BT21-060  U
Ultimate | Unknown | Unknown/LIBERATOR

[Digivolve] [Vemmon]: Cost 6

[When Digivolving] Until your opponent's turn ends, their effects can't trash this Digimon's stacked cards. Then, to 1 of your opponent's Digimon, <De-Digivolve 1> for every 2 [Vemmon] in this Digimon's digivolution cards.
[All Turns] When this Digimon would leave the battle area, you may play 1 [Vemmon] from its digivolution cards without paying the cost.

---
Inherited: [Opponent's Turn] {{OncePerTurn}} When one of your opponent's Digimon attacks, by returning 2 [Vemmon] from this Digimon's digivolution cards to the bottom of the deck, end that attack.