If they are using cards for anything it is wrong,for all power and benefits come from the Spirit.
The Holy Spirit guides us in to all truth,and shows us things to come.
God gives us peace,love,and joy.
We do not use physical objects thinking there is power there,for there is not.That is what people do of the occult,because they are in to nature worship.
And the thing with cards is you can do them over,and it would have a different outcome,but if it is truth the outcome will be the same every time.
Like tarot cards lay them out,get a prediction,shuffle them,lay them out,a different prediction,but if it is truth then it would be the same every time.
Cards are no better than a magic eight ball they shake and get an answer.
The new age movement interpretation of the Bible that is based on the occult,nature worship,exalts people,spiritual evolution through nature,and Jesus is not Lord and Savior,but a good teacher(1 Timothy 4:1-5),and the new age movement is the future for this sinful world,and the time they will not want to listen to the truth of the Bible,but according to their own lusts.
With the cards it has to start some time when people who claim Christianity start looking at things from an occult point of view,and one thing leads to another,and the Bible says they some will depart from the faith,and will turn to an occult viewpoint of the Bible,until it is standard procedure in all the world as a unified religious system.
We would use cards for nothing that has to do with Christianity,and there is no benefit,or power,or truth there,but a waste of time,unless they want to use cards to play Euchre,or Spades,or Hearts,or a card game like that.