Are you sure you cloned them and not copied them?
If they are clones they will each have a unique name or number like sprite1, sprite2, etc.
In your events you can set each one to a different animation using that name.
Set Sprite1 animation "Hearts"
If you want them to show a random card animation then you need a variable to determine which card is shown.
Global variable RandomCard=0
On key press: Set RandomCard = random(1,11)
On RandomCard =1: Set Card1 to animation "Hearts"
and so on for the rest of the cards.