Destromon (BT21-060) - World Convergence

[[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.

[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.