Select an enemy follower on the field. Deal it 3 damage and bury the top card of your deck.
QIf there are no enemy followers on the field, can I still play this spell to put the top card of my deck into my cemetery?
ANo. You must be able to select a follower to play this spell.
QIf there is an enemy follower on the field that I can select, and I have 0 cards in my deck, can I still play this spell?
AYes, you can.