"How I make" isn't the question.
AI intends to simulate human behaviour, so, if you want to design an AI "enough" intelligent to take decisions based on the cards in game, I'd rather ask you "how would YOU make decisions in game"? That'll let you design your AI. Unfortunately, for this, there is no recipe.
Since you've got no idea of coding, you might as well start from the very beginning. Think about any 2 Magic cards. How are the rules that say my card A will beat your card B? If you know how to use Playmaker, do something like that. Make two objects (might be anything) with an Attack value, a Defense value and an Attribute (let's say, an element such as fire, dunno). Then, if you have your object A "attack" your object B, how would you determine whether A will vanquish B? That's more about your game rules.