The criteria are subjective, which may include a cards power level, flavor, synergies, or various other intangibles
Psychic Possession is one of those weird Magic: the Gathering cards that only makes sense in Commander - a four mana blue enchantment that attaches to another player, makes you skip your draw step, but lets you draw a card every time the enchanted opponent does
By no means is the concept newweve seen different card arts on pre-release foils, FNM promos, reprints, and in more recent years, Expeditions, Invocations, Masterpieces, and Secret Lair products
Faramir, Prince of Ithilien With Faramir, Prince of Ithilien, your opponents are damned if they attack you and damned if they dont
Over time, these Creature-types-matter cards have grown not only in number, but also in power level
Kindred Discovery costs five mana and is an Enchantment where you have to choose a Creature type when it enters