The Apostle of Doom Descends!

[Main] 1 of your Digimon may digivolve into a level 6 or lower Digimon card with [Dex] or [DeathX] in its name in the trash with the digivolution cost reduced by 4. Then, place this card in the battle area. [All Turns] When any of your [DexDorugoramon] would leave the battle area, ＜Delay＞ (By trashing this card after the placing turn, activate the effect below.) ・By returning 1 [Dorumon] from those Digimon's digivolution cards to the hand, you may play 1 [DeathXmon] from your trash without paying the cost.

Inherited effect

Security Effect [Security] You may play 1 [Dorumon] from your hand or trash without paying the cost. Then, add this card to the hand.