Pilfer the Wreck (Yellow)

Pilfer the Wreck triggers when it hits a hero. This is an optional effect: You choose whether or not to turn a card in any graveyard face-down at the time the triggered effect resolves. If you turn a card in a graveyard face-down and it is yellow, you will create a Gold token.

The card in that hero’s graveyard must be face-up in order for it to be turned face-down. If there are no cards face-up in that hero’s graveyard at the time this triggered effect resolves, you cannot do this optional effect.