Oblivimon

Effect: {Security} [End of Opponent’s Turn] Play this card without paying the cost.[On Play] [When Digivolving] Flip your opponent's top face-down security card face up and ＜De-Digivolve 1＞ 1 of their Digimon. Then, if it's their turn, this Digimon may digivolve into [Invisimon] in the hand without paying the cost.[Your Turn] When any of your Digimon check face-up security cards, you may place this Digimon's top stacked card face up as the bottom security card.

Inherited Effect: [Your Turn] This Digimon's attack target can't change.