They typically use a resolution of 796 x 1171 pixels, which makes everything fit nicely when you print
Devoid is a characteristic defining ability that can appear on any card type, and simply makes the card colorless regardless of its mana cost
Ajani, Outland Chaperone I didnt want to put this at number one, but I feel like its just so subtly good
You've also got a sub-theme of wizards as there are also quite a few wizards (and cards like Sage of Fables and Stonybrook Banneret helping them out), but don't kid yourself
Westvale Abbey / Ormendahl, Profane Prince Westvale Abbey has a black color identity so it can't be played in every deck, but Ormendahl, Profane Prince is certainly worth going after in decks that can play it
Jonouchi reveals he had sneaked Shgo's Red-Eyes Black Dragon into Yugi's deck, though Yugi refuses to use it until Shgo shows courage