Items that allow you to draw cards are usually widely used because you can play as many items a turn as you wish
Jor Kadeen, the Prevailer +3/+0 is a sizable buff but locking it behind a metalcraft ability raises some deckbuilding concerns
But if they do, they can pull off very powerful effects
Honorable Mention: Old Fogey As often happens with the honorable mentions, we have an Un -card to talk about
In a holo card, the Pokmons image is holographic (sparkly), making the creature stand out
It has some major differences, such as the part where you and the opponent are using different decks constructed using your own cards, but they share a very important thing in common, its all about managing risk and probability