Chaos Degradation (ST10-14) - Starter Deck 10: Parallel World Tactician Foil

[Main] Place 1 of your opponent's Digimon face down at the top or bottom of your opponent's security stack. If you do, trash the top card of your opponent's security stack.

[Security] You may place 1 of your opponent's Digimon face down at the top or bottom of its owner's security stack.