Even Gin Rummy is unfair and can be won on the first turn, so what makes a fair card game?

Jokes aside, Magic: The Gathering is one of the most unfair card games ever made. How could you make a "Magic/Pokemon Clone" and ensure that you are not making unfair cards?

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Is this card fair?

Sainthood W
Instant - Rare
As an additional cost to play Sainthood, sacrifice a creature.
Create a 4/4 Angel Creature Token with Flying.
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By the way, I'm aware of ways of Scientifically ranking cards in TCGs, such as the "Rule of Four". If a card breaks the Rule of Four, it is usually over-powered.
Even Gin Rummy is unfair and can be won on the first turn, so what makes a fair card game?
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