Whenever you cast your first spell on your opponent's turn, you create a 1/1 black Faerie Rogue with flying
Blue is often referred to as the strongest color in Magic for many of the reasons listed above
Additionally, individual card styles will display the exact number of copies being used in the deck
Legacy decks want to get some of Magic's best battlecruisers like Griselbrand and Emrakul, the Aeons Torn into play instantly, while dredge decks utilize creatures like Golgari Thug and Narcomoeba to win
Oketra, Rhonas, Kefnet, and Bontu were all eternalized (zombified) during the War of the Spark, but each of their zombie forms died during the conflict
There aren't that many items in the deck to pull off the Inventor/item strategy effectively, so players are overly reliant on specific character cards to make it work