Start with a cut-up card in a petri dish.
This magic trick being sold by the Japanese company Tenyo is called God Hand or Card Surgery. I suppose the name depends on whether you're a magical scientist or a magical deity. This illusion was invented by magician Lubor Fiedler, and is performed here by Ponta the Smith.
It will cost you about $33 to possess your own hands of God.
God Hand | ゴッドハンド
Here's a video of Mr. Fiedler performing more of his creations - in the 1980s I presume, due to the feathered hairstyles - on German television.
Magician Lubor Fiedler