Raffine provides an ever-growing evasive threat that also provides card selection, and pairs well with cards like Kaito, Luminarch Aspirant, and Wedding Announcement that provide advantage over time
Reducing the cost on this is super doable even outside of graveyard decks, and it's a pretty scary threat when it comes down for 6 or so mana
The Pokmon Blue mascot looks stunning in the rare card type, as he is surrounded by a golden tidal wave of water
The XY Evolutions set celebrated 20 years of the TCG (from the date of the first Japanese set) by reprinting cards in their original format (albeit with updated moves and abilities)
There are also colorless cards, but they do not have the same core identity or mechanics as the normal colored cards
If you master the many ways to bring your artifacts to life, you are leagues ahead of the competition