Card card = game.getCard(cardId);
if (card != null) {
card.moveToExile(exileId, "Ashiok, Nightmare Weaver", source.getSourceId(), game);
}
}
cards.clear();
cards.addAll(opponent.getGraveyard());
for (UUID cardId :cards) {
Card card = game.getCard(cardId);
if (card != null) {
card.moveToExile(exileId, "Ashiok, Nightmare Weaver", source.getSourceId(), game);