Fanatic has a card called "End of Days" that destroys most every card in play:
At the start of the Environment turn, destroy all cards in play, other than this card, character cards, and Relics.
Then, destroy this card.
Several villains, such as the Dreamer, can place cards underneath them:
Whenever a Projection card is destroyed, it is placed under this card. At the start of the Villain turn, if there are (H) times 2 cards underneath this card, the heroes win the game.
Does End of Days affect these "underneath" cards?